{"api_version":"1","generated_at":"2026-08-29T18:36:46+00:00","cve":"CVE-2026-82291","urls":{"html":"https://cve.report/CVE-2026-82291","api":"https://cve.report/api/cve/CVE-2026-82291.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-82291","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-82291"},"summary":{"title":"HeyForm Reflects Any Origin in CORS Responses While Allowing Credentials","description":"HeyForm before 3.0.0-rc.8 reflects the request Origin header in CORS responses while allowing credentials, enabling cross-origin requests with authentication. Attackers can execute authenticated GraphQL queries from malicious pages visited by logged-in users to access workspaces, projects, forms, submissions, and respondent data, or modify account settings.","state":"PUBLISHED","assigner":"VulnCheck","published_at":"2026-08-28 20:20:20","updated_at":"2026-08-28 20:20:20"},"problem_types":["CWE-942","CWE-942 Permissive Cross-domain Security Policy with Untrusted Domains"],"metrics":[{"version":"3.1","source":"disclosure@vulncheck.com","type":"Primary","score":"8.1","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","baseScore":8.1,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"}},{"version":"3.1","source":"CNA","type":"CVSS","score":"8.1","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","version":"3.1"}}],"references":[{"url":"https://github.com/heyform/heyform","name":"https://github.com/heyform/heyform","refsource":"disclosure@vulncheck.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/heyform/heyform/security/advisories/GHSA-fg7j-rmgr-rc9g","name":"https://github.com/heyform/heyform/security/advisories/GHSA-fg7j-rmgr-rc9g","refsource":"disclosure@vulncheck.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/heyform/heyform/blob/v3.0.0-rc.7/packages/server/src/main.ts","name":"https://github.com/heyform/heyform/blob/v3.0.0-rc.7/packages/server/src/main.ts","refsource":"disclosure@vulncheck.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.vulncheck.com/advisories/heyform-reflects-any-origin-in-cors-responses-while-allowing-credentials","name":"https://www.vulncheck.com/advisories/heyform-reflects-any-origin-in-cors-responses-while-allowing-credentials","refsource":"disclosure@vulncheck.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/heyform/heyform/commit/bf9d738ca70ae5641c0c7372982b00365c5144d4","name":"https://github.com/heyform/heyform/commit/bf9d738ca70ae5641c0c7372982b00365c5144d4","refsource":"disclosure@vulncheck.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-82291","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82291","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"heyform","product":"heyform","version":"affected 3.0.0-rc.8 semver","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"CNA","value":"George Chen","lang":"en"}],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"heyform","vendor":"heyform","versions":[{"lessThan":"3.0.0-rc.8","status":"affected","version":"0","versionType":"semver"}]}],"credits":[{"lang":"en","type":"reporter","value":"George Chen"}],"datePublic":"2026-06-23T00:00:00.000Z","descriptions":[{"lang":"en","value":"HeyForm before 3.0.0-rc.8 reflects the request Origin header in CORS responses while allowing credentials, enabling cross-origin requests with authentication. Attackers can execute authenticated GraphQL queries from malicious pages visited by logged-in users to access workspaces, projects, forms, submissions, and respondent data, or modify account settings."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-942","description":"Permissive Cross-domain Security Policy with Untrusted Domains","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-08-28T16:19:07.930Z","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck"},"references":[{"name":"GHSA-fg7j-rmgr-rc9g","tags":["vendor-advisory"],"url":"https://github.com/heyform/heyform/security/advisories/GHSA-fg7j-rmgr-rc9g"},{"name":"Vulnerable code: main.ts","tags":["technical-description"],"url":"https://github.com/heyform/heyform/blob/v3.0.0-rc.7/packages/server/src/main.ts"},{"name":"Fix commit","tags":["patch"],"url":"https://github.com/heyform/heyform/commit/bf9d738ca70ae5641c0c7372982b00365c5144d4"},{"tags":["product"],"url":"https://github.com/heyform/heyform"},{"name":"VulnCheck Advisory: HeyForm Reflects Any Origin in CORS Responses While Allowing Credentials","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/heyform-reflects-any-origin-in-cors-responses-while-allowing-credentials"}],"title":"HeyForm Reflects Any Origin in CORS Responses While Allowing Credentials","x_generator":{"engine":"vulncheck-endgame"}}},"cveMetadata":{"assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","assignerShortName":"VulnCheck","cveId":"CVE-2026-82291","datePublished":"2026-08-28T16:19:07.930Z","dateReserved":"2026-08-28T11:12:54.442Z","dateUpdated":"2026-08-28T16:19:07.930Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-28 20:20:20","lastModifiedDate":"2026-08-28 20:20:20","problem_types":["CWE-942","CWE-942 Permissive Cross-domain Security Policy with Untrusted Domains"],"metrics":{"cvssMetricV31":[{"source":"disclosure@vulncheck.com","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","baseScore":8.1,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":5.2}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"82291","Ordinal":"1","Title":"HeyForm Reflects Any Origin in CORS Responses While Allowing Cre","CVE":"CVE-2026-82291","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"82291","Ordinal":"1","NoteData":"HeyForm before 3.0.0-rc.8 reflects the request Origin header in CORS responses while allowing credentials, enabling cross-origin requests with authentication. Attackers can execute authenticated GraphQL queries from malicious pages visited by logged-in users to access workspaces, projects, forms, submissions, and respondent data, or modify account settings.","Type":"Description","Title":"HeyForm Reflects Any Origin in CORS Responses While Allowing Cre"}]}}}