CVE-2026-25748

HIGH EPSS 37.8%
Published Feb 12, 20264mo ago · Modified Feb 19, 20264mo ago
7.5 CVSS 3.1
High
Find Similar
Published Feb 12, 2026 4mo ago
Last Modified Feb 19, 2026 4mo ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
37.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-287 Improper Authentication Authentication

Affected Products 2

VendorProductVersionRange
goauthentikauthentik* <2025.10.4
goauthentikauthentik*≥2025.12.0  –  <2025.12.4

References 3

  • github.com https://github.com/goauthentik/authentik/releases/tag/version%2F2025.10.4
    ProductRelease Notes
  • github.com https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.4
    ProductRelease Notes
  • github.com https://github.com/goauthentik/authentik/security/advisories/GHSA-fj56-5763-j8pp
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.