| Package | Affected versions | Patched versions |
|---|---|---|
| authentik | ≥ 2025.12.0, < 2025.12.4< 2025.10.4 | 2025.12.42025.10.4 |
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.
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