CVE-2026-41569 — authentik: WS-Federation wreply origin bypass can exfiltrate signed login responses to attacker-controlled endpoints

CVE-2026-41569

authentik: WS-Federation wreply origin bypass can exfiltrate signed login responses to attacker-controlled endpoints PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
goauthentik / authentik	affected < 2026.2.3

CWE

CWE-601

References

https://github.com/goauthentik/authentik/security/advisories/GHSA-995q-72cw-cfw3

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.