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 (3)
Core 3
Core References
Vendor Advisory x_refsource_confirm
https://github.com/goauthentik/authentik/security/advisories/GHSA-fj56-5763-j8pp
Release Notes x_refsource_misc
https://github.com/goauthentik/authentik/releases/tag/version%2F2025.10.4
Release Notes x_refsource_misc
https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.4
Scores
CVSS v3
8.6
EPSS
0.0048
EPSS Percentile
37.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-287
Status
published
Products (1)
goauthentik/authentik
< 2025.10.4
Published
Feb 12, 2026
Tracked Since
Feb 18, 2026