CVE-2026-41577

6.9 mediumEPSS 0.2%

Medium (6.9) in goauthentik authentik. EPSS 0.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

6.9 medium

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 6% of CVEs (scores of 2026-10-31)
CWE: CWE-345
Published: 2026-06-02
Modified: 2026-07-22
Record from: the NVD, synced 2026-10-19

Affected

goauthentik:authentik

References

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

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