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TI-2026-30132 Aliases CVE-2026-41577

authentik: SAML source does not validate Conditions, timing, or audience on assertions

Priority LOW 30CWE-345Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-345.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00169 6th percentileScored 2026-11-07
Fix Fixed authentik (goauthentik): 2025.12.5, 2026.2.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
goauthentikauthentikbefore 2025.12.5; before 2026.2.32025.12.5, 2026.2.3Patch availableCNA
  • authentik Vendorgoauthentik Affected before 2025.12.5; before 2026.2.3 Fixed in 2025.12.5, 2026.2.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*before 2025.12.5; 2026.2.0 to before 2026.2.3Vulnerablegoauthentik
  • cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:* Versions before 2025.12.5; 2026.2.0 to before 2026.2.3 Vulnerable ·goauthentik

Remediation

  • Fix · CNA authentik (goauthentik) Fixed in 2025.12.5, 2026.2.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-41577

References

Advisory 1

  • TI-2026-36603 authentik: SourceStage bypass via empty POST CVSS 3.1CRITICAL 9.8
  • TI-2022-07608 authentik vulnerable to Improper Authentication via invitation URL token reuse CVSS 3.1CRITICAL 9.4
  • TI-2026-36598 authentik: `UserSourceConnection.user` and `GroupSourceConnection.group` are changeable through the API CVSS 3.1HIGH 8.8
  • TI-2022-22816 authentik allows existing authenticated users to create arbitrary accounts CVSS 3.1MEDIUM 6.4
  • TI-2024-25628 Insufficient access control for OAuth2 Device Code flow in authentik CVSS 3.1CRITICAL 9.8
  • TI-2023-24876 authentik potential installation takeover when default admin user is deleted CVSS 3.1CRITICAL 9.8
See all 32 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences