VULNERABILITY INTELLIGENCE

CVE-2026-41569

CVSS score6.9 MEDIUM

EPSS probability0.18%

CISA KEVNot currently listed

Published2026-06-02

Last modified2026-07-22

Description

authentik is an open-source identity provider. Prior to version 2026.2.3, the WS-Federation provider validates the user-supplied wreply parameter using a raw string prefix check rather than proper URL parsing. An attacker who can craft a login link can supply a wreply value on a different origin that passes the check (e.g. https://portal.example.com.evil.tld/), causing the victim's browser to POST the signed WS-Federation login response to attacker-controlled infrastructure. This issue has been patched in version 2026.2.3.