CVE-2026-25922

authentik has a Signature Verification Bypass via SAML Assertion Wrapping

CVSS 8.8 HIGHEPSS 0.2%CWE-287 CWE-347

Vexday Risk Score

21Bajo

Decisión SSVC (CISA)

Track

Sin señal de explotación → monitorear

CVSS 8.8EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

12 feb 2026Publicada en NVD

Recomendación: Monitorear — sin señal de explotación por ahora.

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.

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

Productos afectados

goauthentik · authentik

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Referencias

https://github.com/goauthentik/authentik/releases/tag/version%2F2025.10.4 https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.4 https://github.com/goauthentik/authentik/releases/tag/version%2F2025.8.6 https://github.com/goauthentik/authentik/security/advisories/GHSA-jh35-c4cc-wjm4