{"id":"CVE-2026-94613","state":"PUBLISHED","title":"authentik: Denial of Service via Document Type Declarations in SAML Messages","description":"authentik is an open-source identity provider. Prior to 2026.2.7, 2026.5.7, and 2026.8.2, an unauthenticated attacker can submit a malformed SAML message to an authentik deployment using SAML in either the identity-provider or SAML source role. The message can stop the worker handling /application/saml/* or /source/saml/*, causing the requests assigned to that worker to fail. Worker process termination and automatic restart do not destroy database-backed sessions, but continued malicious messages can cause a sustained share of legitimate traffic to fail. Other protocol implementations are not affected. This issue is fixed in versions 2026.2.7, 2026.5.7, and 2026.8.2.","publishedAt":"2026-09-24T16:13:17.785Z","updatedAt":"2026-09-29T02:53:23.285Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["goauthentik authentik"],"affected":[{"vendor":"goauthentik","product":"authentik","versions":[{"version":"< 2026.2.7","status":"affected"},{"version":">= 2026.5.0, < 2026.5.7","status":"affected"},{"version":">= 2026.8.0, < 2026.8.2","status":"affected"}]}],"references":["https://github.com/goauthentik/authentik/security/advisories/GHSA-cxwx-9x59-28qm","https://github.com/goauthentik/authentik/pull/25959","https://github.com/goauthentik/authentik/pull/25964","https://github.com/goauthentik/authentik/pull/25969","https://github.com/goauthentik/authentik/pull/25974","https://github.com/goauthentik/authentik/commit/03d19d63b8d8dd7bc3de7cf6e57c6df341a9fc86","https://github.com/goauthentik/authentik/commit/4cf2f803b1c2ef38c224eead375fd057a10ee8ac","https://github.com/goauthentik/authentik/commit/732adad26bb97361b6bf25ef138df5c16471ba1f","https://github.com/goauthentik/authentik/commit/a029f5372295bfeb1e334855f78601681cdc9a2d","https://docs.goauthentik.io/releases/2026.2#fixed-in-202627","https://docs.goauthentik.io/releases/2026.5#fixed-in-202657","https://docs.goauthentik.io/releases/2026.8#fixed-in-202682","https://github.com/goauthentik/authentik/releases/tag/version/2026.2.7","https://github.com/goauthentik/authentik/releases/tag/version/2026.5.7","https://github.com/goauthentik/authentik/releases/tag/version/2026.8.2"],"weaknesses":["CWE-770"],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/94xxx/CVE-2026-94613.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-94613","state":"PUBLISHED","datePublished":"2026-09-24T16:13:17.785Z","dateUpdated":"2026-09-29T02:53:23.285Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-09-21T21:32:23.741Z"},"containers":{"cna":{"title":"authentik: Denial of Service via Document Type Declarations in SAML Messages","descriptions":[{"lang":"en","value":"authentik is an open-source identity provider. Prior to 2026.2.7, 2026.5.7, and 2026.8.2, an unauthenticated attacker can submit a malformed SAML message to an authentik deployment using SAML in either the identity-provider or SAML source role. The message can stop the worker handling /application/saml/* or /source/saml/*, causing the requests assigned to that worker to fail. Worker process termination and automatic restart do not destroy database-backed sessions, but continued malicious messages can cause a sustained share of legitimate traffic to fail. Other protocol implementations are not affected. This issue is fixed in versions 2026.2.7, 2026.5.7, and 2026.8.2."}],"affected":[{"vendor":"goauthentik","product":"authentik","versions":[{"version":"< 2026.2.7","status":"affected"},{"version":">= 2026.5.0, < 2026.5.7","status":"affected"},{"version":">= 2026.8.0, < 2026.8.2","status":"affected"}]}],"references":[{"url":"https://github.com/goauthentik/authentik/security/advisories/GHSA-cxwx-9x59-28qm","name":"https://github.com/goauthentik/authentik/security/advisories/GHSA-cxwx-9x59-28qm","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/goauthentik/authentik/pull/25959","name":"https://github.com/goauthentik/authentik/pull/25959","tags":["x_refsource_MISC"]},{"url":"https://github.com/goauthentik/authentik/pull/25964","name":"https://github.com/goauthentik/authentik/pull/25964","tags":["x_refsource_MISC"]},{"url":"https://github.com/goauthentik/authentik/pull/25969","name":"https://github.com/goauthentik/authentik/pull/25969","tags":["x_refsource_MISC"]},{"url":"https://github.com/goauthentik/authentik/pull/25974","name":"https://github.com/goauthentik/authentik/pull/25974","tags":["x_refsource_MISC"]},{"url":"https://github.com/goauthentik/authentik/commit/03d19d63b8d8dd7bc3de7cf6e57c6df341a9fc86","name":"https://github.com/goauthentik/authentik/commit/03d19d63b8d8dd7bc3de7cf6e57c6df341a9fc86","tags":["x_refsource_MISC"]},{"url":"https://github.com/goauthentik/authentik/commit/4cf2f803b1c2ef38c224eead375fd057a10ee8ac","name":"https://github.com/goauthentik/authentik/commit/4cf2f803b1c2ef38c224eead375fd057a10ee8ac","tags":["x_refsource_MISC"]},{"url":"https://github.com/goauthentik/authentik/commit/732adad26bb97361b6bf25ef138df5c16471ba1f","name":"https://github.com/goauthentik/authentik/commit/732adad26bb97361b6bf25ef138df5c16471ba1f","tags":["x_refsource_MISC"]},{"url":"https://github.com/goauthentik/authentik/commit/a029f5372295bfeb1e334855f78601681cdc9a2d","name":"https://github.com/goauthentik/authentik/commit/a029f5372295bfeb1e334855f78601681cdc9a2d","tags":["x_refsource_MISC"]},{"url":"https://docs.goauthentik.io/releases/2026.2#fixed-in-202627","name":"https://docs.goauthentik.io/releases/2026.2#fixed-in-202627","tags":["x_refsource_MISC"]},{"url":"https://docs.goauthentik.io/releases/2026.5#fixed-in-202657","name":"https://docs.goauthentik.io/releases/2026.5#fixed-in-202657","tags":["x_refsource_MISC"]},{"url":"https://docs.goauthentik.io/releases/2026.8#fixed-in-202682","name":"https://docs.goauthentik.io/releases/2026.8#fixed-in-202682","tags":["x_refsource_MISC"]},{"url":"https://github.com/goauthentik/authentik/releases/tag/version/2026.2.7","name":"https://github.com/goauthentik/authentik/releases/tag/version/2026.2.7","tags":["x_refsource_MISC"]},{"url":"https://github.com/goauthentik/authentik/releases/tag/version/2026.5.7","name":"https://github.com/goauthentik/authentik/releases/tag/version/2026.5.7","tags":["x_refsource_MISC"]},{"url":"https://github.com/goauthentik/authentik/releases/tag/version/2026.8.2","name":"https://github.com/goauthentik/authentik/releases/tag/version/2026.8.2","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-770","lang":"en","description":"CWE-770: Allocation of Resources Without Limits or Throttling","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-24T16:13:17.785Z"},"source":{"advisory":"GHSA-cxwx-9x59-28qm","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-29T02:53:11.993694Z","id":"CVE-2026-94613","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-29T02:53:23.285Z"}}]}}}