SAML Vulnerability in Authentik Identity Provider
CVE-2026-41577

6.9MEDIUM

Key Information:

Vendor

Goauthentik

Status
Authentik
Vendor
CVE Published:
2 June 2026

What is CVE-2026-41577?

The Authentik Identity Provider, an open-source solution for identity management, has a vulnerability in the SAML source response processing. The ResponseProcessor.parse() method fails to validate the Conditions element in SAML assertions, which neglects critical elements such as NotBefore, NotOnOrAfter, and AudienceRestriction. This oversight permits the replay of expired assertions and allows assertions intended for different service providers to be incorrectly accepted. Users are encouraged to upgrade to versions 2025.12.5 or 2026.2.3 where this issue has been addressed.

Affected Version(s)

authentik < 2025.12.5 < 2025.12.5

authentik < 2026.2.3 < 2026.2.3

References

https://github.com/goauthentik/authentik/security/advisor...
x_refsource_CONFIRM

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.