CVE-2026-25748
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.
- Goauthentik Authentik
- < 2025.10.4, 2025.12.4
- Fix
- Available
- CVSS 3.1
- 8.6 HIGH
- EPSS
- 0.6% (46th percentile)
- Weakness
- CWE-287
- NVD status
- Analyzed
- Published
- 2026-02-12
CVE-2026-25748 at NVD
No indexed exploits for CVE-2026-25748 yet
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No exploit for CVE-2026-25748 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.