{"id":"CVE-2026-94613","aliases":["BIT-authentik-2026-94613","EUVD-2026-86122","GHSA-cxwx-9x59-28qm"],"status":"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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00643,"percentile":0.51314,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-770"],"published":"2026-09-24T16:13:17Z","modified":"2026-10-28T02:30:34Z","fixes":[{"ecosystem":"Bitnami","package":"authentik","fixed_in":["2026.2.7","2026.5.7","2026.8.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"authentik","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2026.2.7"},{"introduced":"2026.5.0"},{"fixed":"2026.5.7"},{"introduced":"2026.8.0"},{"fixed":"2026.8.2"}]}]}],"products":[{"vendor":"goauthentik","product":"authentik"}],"references":[{"url":"https://github.com/goauthentik/authentik/security/advisories/GHSA-cxwx-9x59-28qm","tags":["x_refsource_CONFIRM","web","advisory"]},{"url":"https://github.com/goauthentik/authentik/pull/25959","tags":["x_refsource_MISC","web","fix"]},{"url":"https://github.com/goauthentik/authentik/pull/25964","tags":["x_refsource_MISC","web","fix"]},{"url":"https://github.com/goauthentik/authentik/pull/25969","tags":["x_refsource_MISC","web","fix"]},{"url":"https://github.com/goauthentik/authentik/pull/25974","tags":["x_refsource_MISC","web","fix"]},{"url":"https://github.com/goauthentik/authentik/commit/03d19d63b8d8dd7bc3de7cf6e57c6df341a9fc86","tags":["x_refsource_MISC","web","fix"]},{"url":"https://github.com/goauthentik/authentik/commit/4cf2f803b1c2ef38c224eead375fd057a10ee8ac","tags":["x_refsource_MISC","web","fix"]},{"url":"https://github.com/goauthentik/authentik/commit/732adad26bb97361b6bf25ef138df5c16471ba1f","tags":["x_refsource_MISC","web","fix"]},{"url":"https://github.com/goauthentik/authentik/commit/a029f5372295bfeb1e334855f78601681cdc9a2d","tags":["x_refsource_MISC","web","fix"]},{"url":"https://docs.goauthentik.io/releases/2026.2#fixed-in-202627","tags":["x_refsource_MISC","web"]},{"url":"https://docs.goauthentik.io/releases/2026.5#fixed-in-202657","tags":["x_refsource_MISC","web"]},{"url":"https://docs.goauthentik.io/releases/2026.8#fixed-in-202682","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/goauthentik/authentik/releases/tag/version/2026.2.7","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/goauthentik/authentik/releases/tag/version/2026.5.7","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/goauthentik/authentik/releases/tag/version/2026.8.2","tags":["x_refsource_MISC","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-94613","tags":["web","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/94xxx/CVE-2026-94613.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-94613","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.","status":"published","published":"2026-09-24T16:13:17.785Z","modified":"2026-09-29T02:53:23.285Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:19:54.122945Z"}],"euvd":[{"id":"EUVD-2026-86122","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.","status":"published","published":"2026-09-24T16:13:17Z","modified":"2026-09-29T02:53:23Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T17:27:52.759804Z"}],"nvd":[{"id":"CVE-2026-94613","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.","status":"published","published":"2026-09-24T17:17:17.723Z","modified":"2026-09-29T03:17:21.707Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:12:51.036099Z"}],"osv":[{"id":"CVE-2026-94613","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.","status":"published","published":"2026-09-24T16:13:17.785Z","modified":"2026-10-28T02:30:34.288136753Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:45:20.931171Z"},{"id":"BIT-authentik-2026-94613","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.","status":"published","published":"2026-10-01T09:23:10.438Z","modified":"2026-10-01T10:10:43.538418829Z","updated_at":"2026-11-02T15:28:28.70813Z"}]}}