CVE-2026-25748

HIGH

8.6

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.

Details CVE

Score CVSS v3.18.6

SeveriteHIGH

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurNONE

Publie2/12/2026

Derniere modification2/19/2026

Sourcenvd

Observations honeypot0

Produits affectes

goauthentik:authentik

Faiblesses (CWE)

CWE-287

References

https://github.com/goauthentik/authentik/releases/tag/version%2F2025.10.4(security-advisories@github.com)

https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.4(security-advisories@github.com)

https://github.com/goauthentik/authentik/security/advisories/GHSA-fj56-5763-j8pp(security-advisories@github.com)

Correlations IOC

Aucune correlation enregistree

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