CVE-2026-41577
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductAuthentik
PublishedJun 2, 2026
First seenJun 2, 2026
Weakness typeCWE-345CWE-345
How to fix
Update
- goauthentik authentik2025.12.5, 2026.2.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| goauthentik authentik | v < 2025.12.5, 2026.2.0 ≤ v < 2026.2.3 | 2025.12.5, 2026.2.3 |
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