{"api_version":"1","generated_at":"2026-10-29T03:48:37+00:00","cve":"CVE-2026-110737","urls":{"html":"https://cve.report/CVE-2026-110737","api":"https://cve.report/api/cve/CVE-2026-110737.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-110737","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-110737"},"summary":{"title":"Push Endpoint Returns Permissive CORS Headers","description":"The push endpoint of a Vaadin application that uses server push reflects the request Origin into the Access-Control-Allow-Origin response header and allows credentials, because Flow configures Atmosphere with DROP_ACCESS_CONTROL_ALLOW_ORIGIN_HEADER set to false and its CorsInterceptor then echoes whatever Origin the request carries. A page on any origin can therefore make a cross origin request to that endpoint with the user's cookies and read the response, although reading anything useful also requires the push identifier of that session. Applications that do not use @Push are not affected, and neither is the WebSocket transport. The behaviour was introduced in January 2015 and is present in every Flow release and in Vaadin Framework from 7.1.0, which is when push was added.\n\n\nUsers of affected versions should apply the following mitigation or upgrade. Releases that have fixed this issue include:\n\nProduct version\nVaadin 14.14.0 - 14.14.7\nVaadin 23.6.0 - 23.6.16\nVaadin 24.4.0 - 24.4.25\nVaadin 24.5.0 - 24.5.15\nVaadin 24.6.0 - 24.6.13\nVaadin 24.7.0 - 24.7.16\nVaadin 24.8.0 - 24.8.17\nVaadin 24.9.0 - 24.9.23\nVaadin 24.10.0 - 24.10.11\nVaadin 25.0.0 - 25.0.13\nVaadin 25.1.0 - 25.1.13\nVaadin 25.2.0 - 25.2.10\nVaadin 25.3.0 - 25.3.2\nVaadin Framework 7.1.0 - 7.7.54\nVaadin Framework 8.0.0 - 8.32.1\n\nMitigation\nUpgrade to 14.14.8\nUpgrade to 23.6.17\nUpgrade to 24.4.26\nUpgrade to 24.7.17\nUpgrade to 24.7.17\nUpgrade to 24.7.17\nUpgrade to 24.9.24\nUpgrade to 24.9.24\nUpgrade to 24.10.12\nUpgrade to 25.2.11\nUpgrade to 25.2.11\nUpgrade to 25.2.11\nUpgrade to 25.3.3\nUpgrade to 7.7.55\nUpgrade to 8.32.2\n\nPlease note that Vaadin versions 10-13 and 15-22 are no longer supported and you should update either to the latest 14, 23, 24, 25 version.\n\nArtifacts under com.vaadin\nMaven coordinates / Vulnerable versions / Fixed version\nvaadin / 14.14.0 - 14.14.7 / >=14.14.8\nvaadin / 23.6.0 - 23.6.16 / >=23.6.17\nvaadin / 24.4.0 - 24.4.25 / >=24.4.26\nvaadin / 24.5.0 - 24.5.15 / >=24.7.17\nvaadin / 24.6.0 - 24.6.13 / >=24.7.17\nvaadin / 24.7.0 - 24.7.16 / >=24.7.17\nvaadin / 24.8.0 - 24.8.17 / >=24.9.24\nvaadin / 24.9.0 - 24.9.23 / >=24.9.24\nvaadin / 24.10.0 - 24.10.11 / >=24.10.12\nvaadin / 25.0.0 - 25.0.13 / >=25.2.11\nvaadin / 25.1.0 - 25.1.13 / >=25.2.11\nvaadin / 25.2.0 - 25.2.10 / >=25.2.11\nvaadin / 25.3.0 - 25.3.2 / >=25.3.3\nvaadin-core / 14.14.0 - 14.14.7 / >=14.14.8\nvaadin-core / 23.6.0 - 23.6.16 / >=23.6.17\nvaadin-core / 24.4.0 - 24.4.25 / >=24.4.26\nvaadin-core / 24.5.0 - 24.5.15 / >=24.7.17\nvaadin-core / 24.6.0 - 24.6.13 / >=24.7.17\nvaadin-core / 24.7.0 - 24.7.16 / >=24.7.17\nvaadin-core / 24.8.0 - 24.8.17 / >=24.9.24\nvaadin-core / 24.9.0 - 24.9.23 / >=24.9.24\nvaadin-core / 24.10.0 - 24.10.11 / >=24.10.12\nvaadin-core / 25.0.0 - 25.0.13 / >=25.2.11\nvaadin-core / 25.1.0 - 25.1.13 / >=25.2.11\nvaadin-core / 25.2.0 - 25.2.10 / >=25.2.11\nvaadin-core / 25.3.0 - 25.3.2 / >=25.3.3\nflow-server / 2.13.0 - 2.13.7 / >=2.13.8\nflow-server / 23.6.0 - 23.6.15 / >=23.6.16\nflow-server / 24.4.0 - 24.4.18 / >=24.4.19\nflow-server / 24.5.0 - 24.5.17 / >=24.7.17\nflow-server / 24.6.0 - 24.6.14 / >=24.7.17\nflow-server / 24.7.0 - 24.7.15 / >=24.7.16\nflow-server / 24.8.0 - 24.8.16 / >=24.9.24\nflow-server / 24.9.0 - 24.9.28 / >=24.9.29\nflow-server / 24.10.0 - 24.10.14 / >=24.10.15\nflow-server / 25.0.0 - 25.0.15 / >=25.2.11\nflow-server / 25.1.0 - 25.1.18 / >=25.1.19\nflow-server / 25.2.0 - 25.2.12 / >=25.2.13\nflow-server / 25.3.0 - 25.3.3 / >=25.3.4\nvaadin-server / 7.1.0 - 7.7.54 / >=7.7.55\nvaadin-server / 8.0.0 - 8.32.1 / >=8.32.2\nvaadin-server-mpr-jakarta / 7.7.36 - 7.7.54 / >=7.7.55\nvaadin-server-mpr-jakarta / 8.18.0 - 8.32.1 / >=8.32.2","state":"PUBLISHED","assigner":"Vaadin","published_at":"2026-10-27 11:17:27","updated_at":"2026-10-27 16:03:45"},"problem_types":["CWE-346","CWE-942","CWE-942 CWE-942 Permissive Cross-domain Policy with Untrusted Domains","CWE-346 CWE-346 Origin Validation Error"],"metrics":[{"version":"4.0","source":"security@vaadin.com","type":"Secondary","score":"2.3","severity":"LOW","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","data":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":2.3,"baseSeverity":"LOW","attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}},{"version":"4.0","source":"CNA","type":"CVSS","score":"2.3","severity":"LOW","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","data":{"Automatable":"NO","Recovery":"AUTOMATIC","Safety":"NEGLIGIBLE","attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":2.3,"baseSeverity":"LOW","privilegesRequired":"NONE","providerUrgency":"CLEAR","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"DIFFUSE","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"LOW"}}],"references":[{"url":"https://github.com/vaadin/flow/issues/26214","name":"https://github.com/vaadin/flow/issues/26214","refsource":"security@vaadin.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://vaadin.com/security/cve-2026-110737","name":"https://vaadin.com/security/cve-2026-110737","refsource":"security@vaadin.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/vaadin/flow/pull/26215","name":"https://github.com/vaadin/flow/pull/26215","refsource":"security@vaadin.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-110737","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-110737","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 14.14.0 14.14.8 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 23.6.0 23.6.17 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 24.4.0 24.4.26 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 24.5.0 24.5.15 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 24.6.0 24.6.13 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 24.7.0 24.7.17 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 24.8.0 24.8.17 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 24.9.0 24.9.24 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 24.10.0 24.10.12 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 25.0.0 25.0.13 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 25.1.0 25.1.13 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 25.2.0 25.2.11 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 25.3.0 25.3.3 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 14.14.0 14.14.8 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 23.6.0 23.6.17 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 24.4.0 24.4.26 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 24.5.0 24.5.15 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 24.6.0 24.6.13 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 24.7.0 24.7.17 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 24.8.0 24.8.17 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 24.9.0 24.9.24 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 24.10.0 24.10.12 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 25.0.0 25.0.13 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 25.1.0 25.1.13 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 25.2.0 25.2.11 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"vaadin","version":"affected 25.3.0 25.3.3 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"flow","version":"affected 2.13.0 2.13.8 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"flow","version":"affected 23.6.0 23.6.16 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"flow","version":"affected 24.4.0 24.4.19 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"flow","version":"affected 24.5.0 24.5.17 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"flow","version":"affected 24.6.0 24.6.14 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"flow","version":"affected 24.7.0 24.7.16 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"flow","version":"affected 24.8.0 24.8.16 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"flow","version":"affected 24.9.0 24.9.29 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"flow","version":"affected 24.10.0 24.10.15 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"flow","version":"affected 25.0.0 25.0.15 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"flow","version":"affected 25.1.0 25.1.19 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"flow","version":"affected 25.2.0 25.2.13 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"flow","version":"affected 25.3.0 25.3.4 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"framework","version":"affected 7.1.0 7.7.55 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"framework","version":"affected 8.0.0 8.32.2 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"framework","version":"affected 7.7.36 7.7.55 maven","platforms":[]},{"source":"CNA","vendor":"vaadin","product":"framework","version":"affected 8.18.0 8.32.2 maven","platforms":[]}],"timeline":[],"solutions":[{"source":"CNA","title":"","value":"Users of affected versions should apply the following mitigation or upgrade.","time":"","lang":"en"}],"workarounds":[{"source":"CNA","title":"","value":"Set the servlet init parameter org.atmosphere.cpr.dropAccessControlAllowOriginHeader to true on the Vaadin servlet, which stops the header being emitted without upgrading. In a Spring Boot application the Vaadin servlet has to be registered explicitly for the parameter to be applied.","time":"","lang":"en"}],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"collectionURL":"https://repo.maven.apache.org/maven2","defaultStatus":"unaffected","packageName":"com.vaadin:vaadin","product":"vaadin","repo":"https://github.com/vaadin/platform","vendor":"vaadin","versions":[{"lessThan":"14.14.8","status":"affected","version":"14.14.0","versionType":"maven"},{"lessThan":"23.6.17","status":"affected","version":"23.6.0","versionType":"maven"},{"lessThan":"24.4.26","status":"affected","version":"24.4.0","versionType":"maven"},{"lessThanOrEqual":"24.5.15","status":"affected","version":"24.5.0","versionType":"maven"},{"lessThanOrEqual":"24.6.13","status":"affected","version":"24.6.0","versionType":"maven"},{"lessThan":"24.7.17","status":"affected","version":"24.7.0","versionType":"maven"},{"lessThanOrEqual":"24.8.17","status":"affected","version":"24.8.0","versionType":"maven"},{"lessThan":"24.9.24","status":"affected","version":"24.9.0","versionType":"maven"},{"lessThan":"24.10.12","status":"affected","version":"24.10.0","versionType":"maven"},{"lessThanOrEqual":"25.0.13","status":"affected","version":"25.0.0","versionType":"maven"},{"lessThanOrEqual":"25.1.13","status":"affected","version":"25.1.0","versionType":"maven"},{"lessThan":"25.2.11","status":"affected","version":"25.2.0","versionType":"maven"},{"lessThan":"25.3.3","status":"affected","version":"25.3.0","versionType":"maven"}]},{"collectionURL":"https://repo.maven.apache.org/maven2","defaultStatus":"unaffected","packageName":"com.vaadin:vaadin-core","product":"vaadin","repo":"https://github.com/vaadin/platform","vendor":"vaadin","versions":[{"lessThan":"14.14.8","status":"affected","version":"14.14.0","versionType":"maven"},{"lessThan":"23.6.17","status":"affected","version":"23.6.0","versionType":"maven"},{"lessThan":"24.4.26","status":"affected","version":"24.4.0","versionType":"maven"},{"lessThanOrEqual":"24.5.15","status":"affected","version":"24.5.0","versionType":"maven"},{"lessThanOrEqual":"24.6.13","status":"affected","version":"24.6.0","versionType":"maven"},{"lessThan":"24.7.17","status":"affected","version":"24.7.0","versionType":"maven"},{"lessThanOrEqual":"24.8.17","status":"affected","version":"24.8.0","versionType":"maven"},{"lessThan":"24.9.24","status":"affected","version":"24.9.0","versionType":"maven"},{"lessThan":"24.10.12","status":"affected","version":"24.10.0","versionType":"maven"},{"lessThanOrEqual":"25.0.13","status":"affected","version":"25.0.0","versionType":"maven"},{"lessThanOrEqual":"25.1.13","status":"affected","version":"25.1.0","versionType":"maven"},{"lessThan":"25.2.11","status":"affected","version":"25.2.0","versionType":"maven"},{"lessThan":"25.3.3","status":"affected","version":"25.3.0","versionType":"maven"}]},{"collectionURL":"https://repo.maven.apache.org/maven2","defaultStatus":"unaffected","packageName":"com.vaadin:flow-server","product":"flow","repo":"https://github.com/vaadin/flow","vendor":"vaadin","versions":[{"lessThan":"2.13.8","status":"affected","version":"2.13.0","versionType":"maven"},{"lessThan":"23.6.16","status":"affected","version":"23.6.0","versionType":"maven"},{"lessThan":"24.4.19","status":"affected","version":"24.4.0","versionType":"maven"},{"lessThanOrEqual":"24.5.17","status":"affected","version":"24.5.0","versionType":"maven"},{"lessThanOrEqual":"24.6.14","status":"affected","version":"24.6.0","versionType":"maven"},{"lessThan":"24.7.16","status":"affected","version":"24.7.0","versionType":"maven"},{"lessThanOrEqual":"24.8.16","status":"affected","version":"24.8.0","versionType":"maven"},{"lessThan":"24.9.29","status":"affected","version":"24.9.0","versionType":"maven"},{"lessThan":"24.10.15","status":"affected","version":"24.10.0","versionType":"maven"},{"lessThanOrEqual":"25.0.15","status":"affected","version":"25.0.0","versionType":"maven"},{"lessThan":"25.1.19","status":"affected","version":"25.1.0","versionType":"maven"},{"lessThan":"25.2.13","status":"affected","version":"25.2.0","versionType":"maven"},{"lessThan":"25.3.4","status":"affected","version":"25.3.0","versionType":"maven"}]},{"collectionURL":"https://repo.maven.apache.org/maven2","defaultStatus":"unaffected","packageName":"com.vaadin:vaadin-server","product":"framework","repo":"https://github.com/vaadin/framework","vendor":"vaadin","versions":[{"lessThan":"7.7.55","status":"affected","version":"7.1.0","versionType":"maven"},{"lessThan":"8.32.2","status":"affected","version":"8.0.0","versionType":"maven"}]},{"collectionURL":"https://repo.maven.apache.org/maven2","defaultStatus":"unaffected","packageName":"com.vaadin:vaadin-server-mpr-jakarta","product":"framework","repo":"https://github.com/vaadin/framework","vendor":"vaadin","versions":[{"lessThan":"7.7.55","status":"affected","version":"7.7.36","versionType":"maven"},{"lessThan":"8.32.2","status":"affected","version":"8.18.0","versionType":"maven"}]}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"The push endpoint of a Vaadin application that uses server push reflects the request Origin into the Access-Control-Allow-Origin response header and allows credentials, because Flow configures Atmosphere with DROP_ACCESS_CONTROL_ALLOW_ORIGIN_HEADER set to false and its CorsInterceptor then echoes whatever Origin the request carries. A page on any origin can therefore make a cross origin request to that endpoint with the user's cookies and read the response, although reading anything useful also requires the push identifier of that session. Applications that do not use @Push are not affected, and neither is the WebSocket transport. The behaviour was introduced in January 2015 and is present in every Flow release and in Vaadin Framework from 7.1.0, which is when push was added.


Users of affected versions should apply the following mitigation or upgrade. Releases that have fixed this issue include:

Product version
Vaadin 14.14.0 - 14.14.7
Vaadin 23.6.0 - 23.6.16
Vaadin 24.4.0 - 24.4.25
Vaadin 24.5.0 - 24.5.15
Vaadin 24.6.0 - 24.6.13
Vaadin 24.7.0 - 24.7.16
Vaadin 24.8.0 - 24.8.17
Vaadin 24.9.0 - 24.9.23
Vaadin 24.10.0 - 24.10.11
Vaadin 25.0.0 - 25.0.13
Vaadin 25.1.0 - 25.1.13
Vaadin 25.2.0 - 25.2.10
Vaadin 25.3.0 - 25.3.2
Vaadin Framework 7.1.0 - 7.7.54
Vaadin Framework 8.0.0 - 8.32.1

Mitigation
Upgrade to 14.14.8
Upgrade to 23.6.17
Upgrade to 24.4.26
Upgrade to 24.7.17
Upgrade to 24.7.17
Upgrade to 24.7.17
Upgrade to 24.9.24
Upgrade to 24.9.24
Upgrade to 24.10.12
Upgrade to 25.2.11
Upgrade to 25.2.11
Upgrade to 25.2.11
Upgrade to 25.3.3
Upgrade to 7.7.55
Upgrade to 8.32.2

Please note that Vaadin versions 10-13 and 15-22 are no longer supported and you should update either to the latest 14, 23, 24, 25 version.

Artifacts
Maven coordinatesVulnerable versionsFixed version
com.vaadin:vaadin
14.14.0 - 14.14.7
≥14.14.8
com.vaadin:vaadin
23.6.0 - 23.6.16
≥23.6.17
com.vaadin:vaadin
24.4.0 - 24.4.25
≥24.4.26
com.vaadin:vaadin
24.5.0 - 24.5.15
≥24.7.17
com.vaadin:vaadin
24.6.0 - 24.6.13
≥24.7.17
com.vaadin:vaadin
24.7.0 - 24.7.16
≥24.7.17
com.vaadin:vaadin
24.8.0 - 24.8.17
≥24.9.24
com.vaadin:vaadin
24.9.0 - 24.9.23
≥24.9.24
com.vaadin:vaadin
24.10.0 - 24.10.11
≥24.10.12
com.vaadin:vaadin
25.0.0 - 25.0.13
≥25.2.11
com.vaadin:vaadin
25.1.0 - 25.1.13
≥25.2.11
com.vaadin:vaadin
25.2.0 - 25.2.10
≥25.2.11
com.vaadin:vaadin
25.3.0 - 25.3.2
≥25.3.3
com.vaadin:vaadin-core
14.14.0 - 14.14.7
≥14.14.8
com.vaadin:vaadin-core
23.6.0 - 23.6.16
≥23.6.17
com.vaadin:vaadin-core
24.4.0 - 24.4.25
≥24.4.26
com.vaadin:vaadin-core
24.5.0 - 24.5.15
≥24.7.17
com.vaadin:vaadin-core
24.6.0 - 24.6.13
≥24.7.17
com.vaadin:vaadin-core
24.7.0 - 24.7.16
≥24.7.17
com.vaadin:vaadin-core
24.8.0 - 24.8.17
≥24.9.24
com.vaadin:vaadin-core
24.9.0 - 24.9.23
≥24.9.24
com.vaadin:vaadin-core
24.10.0 - 24.10.11
≥24.10.12
com.vaadin:vaadin-core
25.0.0 - 25.0.13
≥25.2.11
com.vaadin:vaadin-core
25.1.0 - 25.1.13
≥25.2.11
com.vaadin:vaadin-core
25.2.0 - 25.2.10
≥25.2.11
com.vaadin:vaadin-core
25.3.0 - 25.3.2
≥25.3.3
com.vaadin:flow-server
2.13.0 - 2.13.7
≥2.13.8
com.vaadin:flow-server
23.6.0 - 23.6.15
≥23.6.16
com.vaadin:flow-server
24.4.0 - 24.4.18
≥24.4.19
com.vaadin:flow-server
24.5.0 - 24.5.17
≥24.7.17
com.vaadin:flow-server
24.6.0 - 24.6.14
≥24.7.17
com.vaadin:flow-server
24.7.0 - 24.7.15
≥24.7.16
com.vaadin:flow-server
24.8.0 - 24.8.16
≥24.9.24
com.vaadin:flow-server
24.9.0 - 24.9.28
≥24.9.29
com.vaadin:flow-server
24.10.0 - 24.10.14
≥24.10.15
com.vaadin:flow-server
25.0.0 - 25.0.15
≥25.2.11
com.vaadin:flow-server
25.1.0 - 25.1.18
≥25.1.19
com.vaadin:flow-server
25.2.0 - 25.2.12
≥25.2.13
com.vaadin:flow-server
25.3.0 - 25.3.3
≥25.3.4
com.vaadin:vaadin-server
7.1.0 - 7.7.54
≥7.7.55
com.vaadin:vaadin-server
8.0.0 - 8.32.1
≥8.32.2
com.vaadin:vaadin-server-mpr-jakarta
7.7.36 - 7.7.54
≥7.7.55
com.vaadin:vaadin-server-mpr-jakarta
8.18.0 - 8.32.1
≥8.32.2
"}],"value":"The push endpoint of a Vaadin application that uses server push reflects the request Origin into the Access-Control-Allow-Origin response header and allows credentials, because Flow configures Atmosphere with DROP_ACCESS_CONTROL_ALLOW_ORIGIN_HEADER set to false and its CorsInterceptor then echoes whatever Origin the request carries. A page on any origin can therefore make a cross origin request to that endpoint with the user's cookies and read the response, although reading anything useful also requires the push identifier of that session. Applications that do not use @Push are not affected, and neither is the WebSocket transport. The behaviour was introduced in January 2015 and is present in every Flow release and in Vaadin Framework from 7.1.0, which is when push was added.\n\n\nUsers of affected versions should apply the following mitigation or upgrade. Releases that have fixed this issue include:\n\nProduct version\nVaadin 14.14.0 - 14.14.7\nVaadin 23.6.0 - 23.6.16\nVaadin 24.4.0 - 24.4.25\nVaadin 24.5.0 - 24.5.15\nVaadin 24.6.0 - 24.6.13\nVaadin 24.7.0 - 24.7.16\nVaadin 24.8.0 - 24.8.17\nVaadin 24.9.0 - 24.9.23\nVaadin 24.10.0 - 24.10.11\nVaadin 25.0.0 - 25.0.13\nVaadin 25.1.0 - 25.1.13\nVaadin 25.2.0 - 25.2.10\nVaadin 25.3.0 - 25.3.2\nVaadin Framework 7.1.0 - 7.7.54\nVaadin Framework 8.0.0 - 8.32.1\n\nMitigation\nUpgrade to 14.14.8\nUpgrade to 23.6.17\nUpgrade to 24.4.26\nUpgrade to 24.7.17\nUpgrade to 24.7.17\nUpgrade to 24.7.17\nUpgrade to 24.9.24\nUpgrade to 24.9.24\nUpgrade to 24.10.12\nUpgrade to 25.2.11\nUpgrade to 25.2.11\nUpgrade to 25.2.11\nUpgrade to 25.3.3\nUpgrade to 7.7.55\nUpgrade to 8.32.2\n\nPlease note that Vaadin versions 10-13 and 15-22 are no longer supported and you should update either to the latest 14, 23, 24, 25 version.\n\nArtifacts under com.vaadin\nMaven coordinates / Vulnerable versions / Fixed version\nvaadin / 14.14.0 - 14.14.7 / >=14.14.8\nvaadin / 23.6.0 - 23.6.16 / >=23.6.17\nvaadin / 24.4.0 - 24.4.25 / >=24.4.26\nvaadin / 24.5.0 - 24.5.15 / >=24.7.17\nvaadin / 24.6.0 - 24.6.13 / >=24.7.17\nvaadin / 24.7.0 - 24.7.16 / >=24.7.17\nvaadin / 24.8.0 - 24.8.17 / >=24.9.24\nvaadin / 24.9.0 - 24.9.23 / >=24.9.24\nvaadin / 24.10.0 - 24.10.11 / >=24.10.12\nvaadin / 25.0.0 - 25.0.13 / >=25.2.11\nvaadin / 25.1.0 - 25.1.13 / >=25.2.11\nvaadin / 25.2.0 - 25.2.10 / >=25.2.11\nvaadin / 25.3.0 - 25.3.2 / >=25.3.3\nvaadin-core / 14.14.0 - 14.14.7 / >=14.14.8\nvaadin-core / 23.6.0 - 23.6.16 / >=23.6.17\nvaadin-core / 24.4.0 - 24.4.25 / >=24.4.26\nvaadin-core / 24.5.0 - 24.5.15 / >=24.7.17\nvaadin-core / 24.6.0 - 24.6.13 / >=24.7.17\nvaadin-core / 24.7.0 - 24.7.16 / >=24.7.17\nvaadin-core / 24.8.0 - 24.8.17 / >=24.9.24\nvaadin-core / 24.9.0 - 24.9.23 / >=24.9.24\nvaadin-core / 24.10.0 - 24.10.11 / >=24.10.12\nvaadin-core / 25.0.0 - 25.0.13 / >=25.2.11\nvaadin-core / 25.1.0 - 25.1.13 / >=25.2.11\nvaadin-core / 25.2.0 - 25.2.10 / >=25.2.11\nvaadin-core / 25.3.0 - 25.3.2 / >=25.3.3\nflow-server / 2.13.0 - 2.13.7 / >=2.13.8\nflow-server / 23.6.0 - 23.6.15 / >=23.6.16\nflow-server / 24.4.0 - 24.4.18 / >=24.4.19\nflow-server / 24.5.0 - 24.5.17 / >=24.7.17\nflow-server / 24.6.0 - 24.6.14 / >=24.7.17\nflow-server / 24.7.0 - 24.7.15 / >=24.7.16\nflow-server / 24.8.0 - 24.8.16 / >=24.9.24\nflow-server / 24.9.0 - 24.9.28 / >=24.9.29\nflow-server / 24.10.0 - 24.10.14 / >=24.10.15\nflow-server / 25.0.0 - 25.0.15 / >=25.2.11\nflow-server / 25.1.0 - 25.1.18 / >=25.1.19\nflow-server / 25.2.0 - 25.2.12 / >=25.2.13\nflow-server / 25.3.0 - 25.3.3 / >=25.3.4\nvaadin-server / 7.1.0 - 7.7.54 / >=7.7.55\nvaadin-server / 8.0.0 - 8.32.1 / >=8.32.2\nvaadin-server-mpr-jakarta / 7.7.36 - 7.7.54 / >=7.7.55\nvaadin-server-mpr-jakarta / 8.18.0 - 8.32.1 / >=8.32.2"}],"impacts":[{"capecId":"CAPEC-468","descriptions":[{"lang":"en","value":"CAPEC-468 Generic Cross-Browser Cross-Domain Theft"}]}],"metrics":[{"cvssV4_0":{"Automatable":"NO","Recovery":"AUTOMATIC","Safety":"NEGLIGIBLE","attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":2.3,"baseSeverity":"LOW","privilegesRequired":"NONE","providerUrgency":"CLEAR","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"DIFFUSE","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"LOW"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-942","description":"CWE-942 Permissive Cross-domain Policy with Untrusted Domains","lang":"en","type":"CWE"},{"cweId":"CWE-346","description":"CWE-346 Origin Validation Error","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-10-27T13:03:37.752Z","orgId":"9e0f3122-90e9-42d5-93de-8c6b98deef7e","shortName":"Vaadin"},"references":[{"url":"https://vaadin.com/security/cve-2026-110737"},{"url":"https://github.com/vaadin/flow/issues/26214"},{"url":"https://github.com/vaadin/flow/pull/26215"}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Users of affected versions should apply the following mitigation or upgrade.
"}],"value":"Users of affected versions should apply the following mitigation or upgrade."}],"source":{"discovery":"UNKNOWN"},"title":"Push Endpoint Returns Permissive CORS Headers","workarounds":[{"lang":"en","value":"Set the servlet init parameter org.atmosphere.cpr.dropAccessControlAllowOriginHeader to true on the Vaadin servlet, which stops the header being emitted without upgrading. In a Spring Boot application the Vaadin servlet has to be registered explicitly for the parameter to be applied."}],"x_generator":{"engine":"Vulnogram 0.5.0"}}},"cveMetadata":{"assignerOrgId":"9e0f3122-90e9-42d5-93de-8c6b98deef7e","assignerShortName":"Vaadin","cveId":"CVE-2026-110737","datePublished":"2026-10-27T10:26:37.752Z","dateReserved":"2026-10-14T16:07:47.846Z","dateUpdated":"2026-10-27T13:03:37.752Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-27 11:17:27","lastModifiedDate":"2026-10-27 16:03:45","problem_types":["CWE-346","CWE-942","CWE-942 CWE-942 Permissive Cross-domain Policy with Untrusted Domains","CWE-346 CWE-346 Origin Validation Error"],"metrics":{"cvssMetricV40":[{"source":"security@vaadin.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":2.3,"baseSeverity":"LOW","attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"110737","Ordinal":"1","Title":"Push Endpoint Returns Permissive CORS Headers","CVE":"CVE-2026-110737","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"110737","Ordinal":"1","NoteData":"The push endpoint of a Vaadin application that uses server push reflects the request Origin into the Access-Control-Allow-Origin response header and allows credentials, because Flow configures Atmosphere with DROP_ACCESS_CONTROL_ALLOW_ORIGIN_HEADER set to false and its CorsInterceptor then echoes whatever Origin the request carries. A page on any origin can therefore make a cross origin request to that endpoint with the user's cookies and read the response, although reading anything useful also requires the push identifier of that session. Applications that do not use @Push are not affected, and neither is the WebSocket transport. The behaviour was introduced in January 2015 and is present in every Flow release and in Vaadin Framework from 7.1.0, which is when push was added.\n\n\nUsers of affected versions should apply the following mitigation or upgrade. Releases that have fixed this issue include:\n\nProduct version\nVaadin 14.14.0 - 14.14.7\nVaadin 23.6.0 - 23.6.16\nVaadin 24.4.0 - 24.4.25\nVaadin 24.5.0 - 24.5.15\nVaadin 24.6.0 - 24.6.13\nVaadin 24.7.0 - 24.7.16\nVaadin 24.8.0 - 24.8.17\nVaadin 24.9.0 - 24.9.23\nVaadin 24.10.0 - 24.10.11\nVaadin 25.0.0 - 25.0.13\nVaadin 25.1.0 - 25.1.13\nVaadin 25.2.0 - 25.2.10\nVaadin 25.3.0 - 25.3.2\nVaadin Framework 7.1.0 - 7.7.54\nVaadin Framework 8.0.0 - 8.32.1\n\nMitigation\nUpgrade to 14.14.8\nUpgrade to 23.6.17\nUpgrade to 24.4.26\nUpgrade to 24.7.17\nUpgrade to 24.7.17\nUpgrade to 24.7.17\nUpgrade to 24.9.24\nUpgrade to 24.9.24\nUpgrade to 24.10.12\nUpgrade to 25.2.11\nUpgrade to 25.2.11\nUpgrade to 25.2.11\nUpgrade to 25.3.3\nUpgrade to 7.7.55\nUpgrade to 8.32.2\n\nPlease note that Vaadin versions 10-13 and 15-22 are no longer supported and you should update either to the latest 14, 23, 24, 25 version.\n\nArtifacts under com.vaadin\nMaven coordinates / Vulnerable versions / Fixed version\nvaadin / 14.14.0 - 14.14.7 / >=14.14.8\nvaadin / 23.6.0 - 23.6.16 / >=23.6.17\nvaadin / 24.4.0 - 24.4.25 / >=24.4.26\nvaadin / 24.5.0 - 24.5.15 / >=24.7.17\nvaadin / 24.6.0 - 24.6.13 / >=24.7.17\nvaadin / 24.7.0 - 24.7.16 / >=24.7.17\nvaadin / 24.8.0 - 24.8.17 / >=24.9.24\nvaadin / 24.9.0 - 24.9.23 / >=24.9.24\nvaadin / 24.10.0 - 24.10.11 / >=24.10.12\nvaadin / 25.0.0 - 25.0.13 / >=25.2.11\nvaadin / 25.1.0 - 25.1.13 / >=25.2.11\nvaadin / 25.2.0 - 25.2.10 / >=25.2.11\nvaadin / 25.3.0 - 25.3.2 / >=25.3.3\nvaadin-core / 14.14.0 - 14.14.7 / >=14.14.8\nvaadin-core / 23.6.0 - 23.6.16 / >=23.6.17\nvaadin-core / 24.4.0 - 24.4.25 / >=24.4.26\nvaadin-core / 24.5.0 - 24.5.15 / >=24.7.17\nvaadin-core / 24.6.0 - 24.6.13 / >=24.7.17\nvaadin-core / 24.7.0 - 24.7.16 / >=24.7.17\nvaadin-core / 24.8.0 - 24.8.17 / >=24.9.24\nvaadin-core / 24.9.0 - 24.9.23 / >=24.9.24\nvaadin-core / 24.10.0 - 24.10.11 / >=24.10.12\nvaadin-core / 25.0.0 - 25.0.13 / >=25.2.11\nvaadin-core / 25.1.0 - 25.1.13 / >=25.2.11\nvaadin-core / 25.2.0 - 25.2.10 / >=25.2.11\nvaadin-core / 25.3.0 - 25.3.2 / >=25.3.3\nflow-server / 2.13.0 - 2.13.7 / >=2.13.8\nflow-server / 23.6.0 - 23.6.15 / >=23.6.16\nflow-server / 24.4.0 - 24.4.18 / >=24.4.19\nflow-server / 24.5.0 - 24.5.17 / >=24.7.17\nflow-server / 24.6.0 - 24.6.14 / >=24.7.17\nflow-server / 24.7.0 - 24.7.15 / >=24.7.16\nflow-server / 24.8.0 - 24.8.16 / >=24.9.24\nflow-server / 24.9.0 - 24.9.28 / >=24.9.29\nflow-server / 24.10.0 - 24.10.14 / >=24.10.15\nflow-server / 25.0.0 - 25.0.15 / >=25.2.11\nflow-server / 25.1.0 - 25.1.18 / >=25.1.19\nflow-server / 25.2.0 - 25.2.12 / >=25.2.13\nflow-server / 25.3.0 - 25.3.3 / >=25.3.4\nvaadin-server / 7.1.0 - 7.7.54 / >=7.7.55\nvaadin-server / 8.0.0 - 8.32.1 / >=8.32.2\nvaadin-server-mpr-jakarta / 7.7.36 - 7.7.54 / >=7.7.55\nvaadin-server-mpr-jakarta / 8.18.0 - 8.32.1 / >=8.32.2","Type":"Description","Title":"Push Endpoint Returns Permissive CORS Headers"}]}}}