CVE-2026-94612
highauthentik is an open-source identity provider.
authentik is an open-source identity provider. Prior to 2026.2.7, 2026.5.7, and 2026.8.2, an authentik SAML Source verifies an assertion's signature and validity period but does not ensure that the identity provider issued the assertion for that Source or in response to a login request from that Source. The SAML Source also does not record already accepted assertions, allowing replay. An unauthenticated actor who possesses such a valid assertion can use an assertion intended for another service provider or reuse an earlier assertion to authenticate as the user named by the assertion. Only SAML Sources are affected; SAML Providers and other Source types are not affected. This issue is fixed in versions 2026.2.7, 2026.5.7, and 2026.8.2.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://docs.goauthentik.io/releases/2026.2#fixed-in-202627 security-advisories@github.com
- https://docs.goauthentik.io/releases/2026.5#fixed-in-202657 security-advisories@github.com
- https://docs.goauthentik.io/releases/2026.8#fixed-in-202682 security-advisories@github.com
- https://github.com/goauthentik/authentik/commit/287ea13cdc23c378abc20a7b71c9c7919a19a89a security-advisories@github.com
- https://github.com/goauthentik/authentik/commit/355d8cc3d755fbba05fc5fa90ffbcbe6469acddd security-advisories@github.com
- https://github.com/goauthentik/authentik/commit/54fac864a0b3bc00551af1908f662b3bf5cc6135 security-advisories@github.com
- https://github.com/goauthentik/authentik/commit/984b0162711f0d1988ed33544d0a671c93e4ec76 security-advisories@github.com
- https://github.com/goauthentik/authentik/pull/25957 security-advisories@github.com
- https://github.com/goauthentik/authentik/pull/25962 security-advisories@github.com
- https://github.com/goauthentik/authentik/pull/25967 security-advisories@github.com
- https://github.com/goauthentik/authentik/pull/25972 security-advisories@github.com
- https://github.com/goauthentik/authentik/releases/tag/version/2026.2.7 security-advisories@github.com
- https://github.com/goauthentik/authentik/releases/tag/version/2026.5.7 security-advisories@github.com
- https://github.com/goauthentik/authentik/releases/tag/version/2026.8.2 security-advisories@github.com
- https://github.com/goauthentik/authentik/security/advisories/GHSA-cqj8-fxxf-9pg7 security-advisories@github.com