{"id":"BIT-authentik-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":["CVE-2026-94613","GHSA-cxwx-9x59-28qm"],"modified":"2026-10-01T10:10:43.538418829Z","published":"2026-10-01T09:23:10.438Z","database_specific":{"cpes":["cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*"],"severity":"High"},"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/commit/03d19d63b8d8dd7bc3de7cf6e57c6df341a9fc86"},{"type":"WEB","url":"https://github.com/goauthentik/authentik/commit/4cf2f803b1c2ef38c224eead375fd057a10ee8ac"},{"type":"WEB","url":"https://github.com/goauthentik/authentik/commit/732adad26bb97361b6bf25ef138df5c16471ba1f"},{"type":"WEB","url":"https://github.com/goauthentik/authentik/commit/a029f5372295bfeb1e334855f78601681cdc9a2d"},{"type":"WEB","url":"https://github.com/goauthentik/authentik/pull/25959"},{"type":"WEB","url":"https://github.com/goauthentik/authentik/pull/25964"},{"type":"WEB","url":"https://github.com/goauthentik/authentik/pull/25969"},{"type":"WEB","url":"https://github.com/goauthentik/authentik/pull/25974"},{"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":"WEB","url":"https://github.com/goauthentik/authentik/security/advisories/GHSA-cxwx-9x59-28qm"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-94613"}],"affected":[{"package":{"name":"authentik","ecosystem":"Bitnami","purl":"pkg:bitnami/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"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/authentik/BIT-authentik-2026-94613.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}],"schema_version":"1.9.0"}