{"id":"CVE-2026-94613","summary":"authentik: Denial of Service via Document Type Declarations in SAML Messages","details":"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.","aliases":["GHSA-cxwx-9x59-28qm"],"modified":"2026-09-27T03:30:35.524012296Z","published":"2026-09-24T16:13:17.785Z","database_specific":{"cwe_ids":["CWE-770"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/94xxx/CVE-2026-94613.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://docs.goauthentik.io/releases/2026.2#fixed-in-202627"},{"type":"WEB","url":"https://docs.goauthentik.io/releases/2026.5#fixed-in-202657"},{"type":"WEB","url":"https://docs.goauthentik.io/releases/2026.8#fixed-in-202682"},{"type":"WEB","url":"https://github.com/goauthentik/authentik/releases/tag/version/2026.2.7"},{"type":"WEB","url":"https://github.com/goauthentik/authentik/releases/tag/version/2026.5.7"},{"type":"WEB","url":"https://github.com/goauthentik/authentik/releases/tag/version/2026.8.2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/94xxx/CVE-2026-94613.json"},{"type":"ADVISORY","url":"https://github.com/goauthentik/authentik/security/advisories/GHSA-cxwx-9x59-28qm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-94613"},{"type":"FIX","url":"https://github.com/goauthentik/authentik/commit/03d19d63b8d8dd7bc3de7cf6e57c6df341a9fc86"},{"type":"FIX","url":"https://github.com/goauthentik/authentik/commit/4cf2f803b1c2ef38c224eead375fd057a10ee8ac"},{"type":"FIX","url":"https://github.com/goauthentik/authentik/commit/732adad26bb97361b6bf25ef138df5c16471ba1f"},{"type":"FIX","url":"https://github.com/goauthentik/authentik/commit/a029f5372295bfeb1e334855f78601681cdc9a2d"},{"type":"FIX","url":"https://github.com/goauthentik/authentik/pull/25959"},{"type":"FIX","url":"https://github.com/goauthentik/authentik/pull/25964"},{"type":"FIX","url":"https://github.com/goauthentik/authentik/pull/25969"},{"type":"FIX","url":"https://github.com/goauthentik/authentik/pull/25974"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/goauthentik/authentik","events":[{"introduced":"0"},{"introduced":"7a71bcfcdc442204b8985ab379b22f7eb9fe321f"},{"introduced":"f3753ec20ce13ef672401a131379d1a5a2d3439b"},{"fixed":"0936c5b0ce31dc98f5f9eb4b06730a13f6da0333"},{"fixed":"71d3c21110023b914232d75b6c9089f472e2f73c"},{"fixed":"dce85a5b64a429206199e9ffddc602060643f17a"},{"fixed":"03d19d63b8d8dd7bc3de7cf6e57c6df341a9fc86"},{"fixed":"4cf2f803b1c2ef38c224eead375fd057a10ee8ac"},{"fixed":"732adad26bb97361b6bf25ef138df5c16471ba1f"},{"fixed":"a029f5372295bfeb1e334855f78601681cdc9a2d"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2026.2.7"},{"introduced":"2026.5.0"},{"fixed":"2026.5.7"},{"introduced":"2026.8.0"},{"fixed":"2026.8.2"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["version/2026.8.1","version/2026.8.0","version/2026.5.6","version/2026.2.6","version/2026.5.5","version/2026.2.5","version/2026.5.4","version/2026.5.3","version/2026.2.4","version/2026.5.2","version/2026.5.0","version/2026.2.3","version/2026.2.3-rc1","version/2026.2.2","version/2026.2.2-rc3","version/2026.2.2-rc2","version/2026.2.2-rc1","version/2026.2.1","version/2026.2.1-rc1","version/2026.2.0","version/2026.2.0-rc5","version/2026.2.0-rc4","version/2026.2.0-rc3","version/2026.2.0-rc2","version/2026.2.0-rc1","version/2023.10.0","version/2023.8.2","version/2023.8.1","version/2023.8.0","version/2023.6.0","version/2023.5.1","version/2023.2.1","version/2022.12.1","version/2022.12.0","version/2022.10.1","version/2022.9.0","version/2022.8.2","version/2022.8.1","version/2022.7.2","version/2022.6.2","version/2022.5.2","version/2022.5.1","version/2022.4.1","version/2022.3.3","version/2022.2.1","version/2022.1.4","version/2022.1.3","version/2022.1.1","version/2021.12.5","version/2021.12.4","version/2021.12.3","version/2021.12.2","version/2021.12.1","version/2021.12.1-rc5","version/2021.12.1-rc4","version/2021.12.1-rc3","version/2021.12.1-rc2","version/2021.12.1-rc1","version/2021.10.4","version/2021.10.3","version/2021.10.1-rc3","version/2021.9.3","version/2021.9.2","version/2021.9.1","version/2021.9.1-rc3","version/2021.9.1-rc2","version/2021.9.1-rc1","version/2021.8.4","version/2021.8.3","version/2021.8.2","version/2021.8.1","version/2021.8.1-rc2","version/2021.7.1","version/2021.7.1-rc1","version/2021.6.4","version/2021.6.3","version/2021.6.1","version/2021.6.1-rc4","version/2021.6.1-rc3","version/2021.6.1-rc2","version/2021.6.1-rc1","version/2021.5.2","version/2021.5.1","version/2021.5.1-rc10","version/2021.5.1-rc9","version/2021.5.1-rc8","version/2021.4.1","version/2021.4.1-rc2","version/2021.4.1-rc1","version/2021.3.4","version/2021.3.3","version/2021.3.2","version/2021.3.1","version/2021.3.1-rc2","version/2021.3.1-rc1","version/2021.2.3-stable","version/2021.2.2-stable","version/2021.1.3-stable","version/2021.1.2-stable","version/2021.1.1-stable","version/2021.1.1-rc2","version/2021.1.1-rc1","version/0.13.3-stable","version/0.13.2-stable","version/0.13.1-stable","version/0.13.0-stable","version/0.13.0-rc4","version/0.13.0-rc3"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