{"api_version":"1","generated_at":"2026-04-22T23:09:25+00:00","cve":"CVE-2023-27496","urls":{"html":"https://cve.report/CVE-2023-27496","api":"https://cve.report/api/cve/CVE-2023-27496.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-27496","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-27496"},"summary":{"title":"CVE-2023-27496","description":"Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, the OAuth filter assumes that a `state` query param is present on any response that looks like an OAuth redirect response. Sending it a request with the URI path equivalent to the redirect path, without the `state` parameter, will lead to abnormal termination of Envoy process. Versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9 contain a patch. The issue can also be mitigated by locking down OAuth traffic, disabling the filter, or by filtering traffic before it reaches the OAuth filter (e.g. via a lua script).","state":"PUBLIC","assigner":"security-advisories@github.com","published_at":"2023-04-04 20:15:00","updated_at":"2023-11-07 04:09:00"},"problem_types":["NVD-CWE-noinfo"],"metrics":[],"references":[{"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j79q-2g66-2xv5","name":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j79q-2g66-2xv5","refsource":"MISC","tags":[],"title":"Crash when a redirect url without a state param is received in the oauth filter · Advisory · envoyproxy/envoy · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-27496","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-27496","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2023","cve_id":"27496","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"envoyproxy","cpe5":"envoy","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2023-27496","qid":"160710","title":"Oracle Enterprise Linux Security Update for olcne (ELSA-2023-23648)"},{"cve":"CVE-2023-27496","qid":"355149","title":"Amazon Linux Security Advisory for ecs-service-connect-agent : ALAS2023-2023-165"},{"cve":"CVE-2023-27496","qid":"355316","title":"Amazon Linux Security Advisory for ecs-service-connect-agent : ALAS2ECS-2023-003"}]},"source_records":{"cve_program":{"data_version":"4.0","data_type":"CVE","data_format":"MITRE","CVE_data_meta":{"ID":"CVE-2023-27496","ASSIGNER":"security-advisories@github.com","STATE":"PUBLIC"},"description":{"description_data":[{"lang":"eng","value":"Envoy is an open source edge and service proxy designed for cloud-native applications. 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The issue can also be mitigated by locking down OAuth traffic, disabling the filter, or by filtering traffic before it reaches the OAuth filter (e.g. via a lua script)."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-20: Improper Input Validation","cweId":"CWE-20"}]}]},"affects":{"vendor":{"vendor_data":[{"vendor_name":"envoyproxy","product":{"product_data":[{"product_name":"envoy","version":{"version_data":[{"version_affected":"=","version_value":">= 1.25.0, < 1.25.3"},{"version_affected":"=","version_value":">= 1.24.0, < 1.24.4"},{"version_affected":"=","version_value":">= 1.23.0, < 1.23.6"},{"version_affected":"=","version_value":"< 1.22.9"}]}}]}}]}},"references":{"reference_data":[{"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j79q-2g66-2xv5","refsource":"MISC","name":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j79q-2g66-2xv5"}]},"source":{"advisory":"GHSA-j79q-2g66-2xv5","discovery":"UNKNOWN"},"impact":{"cvss":[{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"}]}},"nvd":{"publishedDate":"2023-04-04 20:15:00","lastModifiedDate":"2023-11-07 04:09:00","problem_types":["NVD-CWE-noinfo"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","versionStartIncluding":"1.25.0","versionEndExcluding":"1.25.3","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","versionStartIncluding":"1.24.0","versionEndExcluding":"1.24.4","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","versionStartIncluding":"1.23.0","versionEndExcluding":"1.23.6","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","versionEndExcluding":"1.22.9","cpe_name":[]}]}]}},"legacy_mitre":{"record":null,"notes":[]}}}