CVE-2026-41577 Details
Description
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.
A vulnerability exists in authentik, an open-source identity provider, in versions prior to 2025.12.5 and 2026.2.3. The issue arises in the SAML source response processor, specifically in the 'ResponseProcessor.parse()' method', which fails to validate the 'Conditions' element on assertions. This oversight allows the replay of expired assertions and the acceptance of assertions meant for other service providers.
Users can upgrade to authentik versions 2025.12.5 or 2026.2.3 to address this vulnerability. For versions prior to 2025.12.5 and 2026.2.3, a workaround is available.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 3, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/goauthentik/authentik/security/advisories/GHSA-4v4x-x5pr-8gp2 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-345 | Insufficient Verification of Data Authenticity | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| goauthentik authentik | < 2025.12.5 >= 2026.2.0, < 2026.2.3 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 22, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 4, 2026 | Initial Analysis | [email protected] |
| Jun 2, 2026 | New CVE Received | [email protected] |