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.
History

Thu, 19 Feb 2026 15:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*

Tue, 17 Feb 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 13 Feb 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Goauthentik
Goauthentik authentik
Vendors & Products Goauthentik
Goauthentik authentik

Thu, 12 Feb 2026 19:45:00 +0000

Type Values Removed Values Added
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.
Title authentik has a forward authentication bypass with broken cookie
Weaknesses CWE-287
References
Metrics cvssV3_1

{'score': 8.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-02-12T19:36:45.631Z

Updated: 2026-02-17T15:53:01.301Z

Reserved: 2026-02-05T18:35:52.356Z

Link: CVE-2026-25748

cve-icon Vulnrichment

Updated: 2026-02-17T15:52:58.083Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-12T20:16:10.473

Modified: 2026-02-19T15:23:42.360

Link: CVE-2026-25748

cve-icon Redhat

No data.