Description
authentik is an open-source identity provider. Prior to 2025.10.4 and 2025.12.4, with a malformed cookie it was possible to bypass authentication when using forward authentication in the authentik Proxy Provider when used in conjunction with Traefik or Caddy as reverse proxy. When a malicious cookie was used, none of the authentik-specific X-Authentik-* headers were set which depending on application can grant access to an attacker. authentik 2025.10.4 and 2025.12.4 fix this issue.
Problem types
CWE-287: Improper Authentication
Product status
>= 2025.10.0-rc1, < 2025.12.4
References
github.com/...hentik/security/advisories/GHSA-fj56-5763-j8pp
github.com/...entik/authentik/releases/tag/version/2025.10.4
github.com/...entik/authentik/releases/tag/version/2025.12.4