CVE-2026-41577

authentik is an open-source identity provider. Prior to versions 2025.12.5 and 2026.2.3, the SAML source response processor (ResponseProcessor.parse()) does not validate the Conditions element on assertions. NotBefore, NotOnOrAfter, and AudienceRestriction are all ignored. This allows replay of expired assertions and acceptance of assertions intended for other service providers. This issue has been patched in versions 2025.12.5 and 2026.2.3.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/goauthentik/authentik/security/advisories/GHSA-4v4x-x5pr-8gp2	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:goauthentik:authentik::::::::
	cpe:2.3:a:goauthentik:authentik::::::::

History

No history.

Information

Published : 2026-06-02 20:16

Updated : 2026-07-22 19:10

NVD link : CVE-2026-41577

Mitre link : CVE-2026-41577

CVE.ORG link : CVE-2026-41577

JSON object : View

Products Affected

goauthentik

authentik

CWE

CWE-345

Insufficient Verification of Data Authenticity

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