Detections
Analytics
CVE-2026-25748
high
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.
References
https://github.com/goauthentik/authentik/security/advisories/GHSA-fj56-5763-j8pp
https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.4
https://github.com/goauthentik/authentik/releases/tag/version%2F2025.10.4