CVE-2026-25922: authentik is an open-source identity provider. Prior to 2025.8.6, 2025.10.4, and 2025.12.4, when using a SAML Source that has the option Verify Assertion…

PriorityP353high8.8CVSS 3.1

AVNACLPRLUINSUCHIHAH

EPSS

0.17%

6.1th percentile

authentik is an open-source identity provider. Prior to 2025.8.6, 2025.10.4, and 2025.12.4, when using a SAML Source that has the option Verify Assertion Signature under Verification Certificate enabled and not Verify Response Signature, or does not have the Encryption Certificate setting under Advanced Protocol settings configured, it was possible for an attacker to inject a malicious assertion before the signed assertion that authentik would use instead. authentik 2025.8.6, 2025.10.4, and 2025.12.4 fix this issue.

Affected

5 ranges

Vendor	Product	Version range	Fixed in
goauthentik	authentik	< 2025.8.6	2025.8.6
goauthentik	authentik	—	—
goauthentik	authentik	—	—
goauthentik	authentik	>= 2025.10.0 < 2025.10.4	2025.10.4
goauthentik	authentik	>= 2025.12.0 < 2025.12.4	2025.12.4

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.