What’s Vulnerable › Vulnerabilities
CVE-2026-41577: authentik: SAML source does not validate Conditions, timing, or audience on assertions
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-02 · updated 2026-07-22
- Weakness: CWE-345
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.
Affected products
- goauthentik authentik: before 2025.12.5; from 2026.2.0 before 2026.2.3 — fixed in 2025.12.5, 2026.2.3
How to fix
Upgrade to a fixed version: goauthentik authentik 2025.12.5, 2026.2.3. Check the vendor advisory for mitigations.
References
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