CVE-2026-117691criticalCWE-347

CVE-2026-117691: fallo crítico en Red Hat build of Keycloak 26.6

Keycloak-services: keycloak-services: saml redirect binding signature bypass via percent-encoded parameter names

Publicada el · Actualizada el

Seguir esta CVE+ Monitorear Red Hat build of Keycloak+ Monitorear Red Hat Single Sign-On

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48Vexday Risk Score

Sin señal de explotación. Ella tiene prueba de concepto pública.

ssvc Attendcvss 9.1epss 0.3%
de la publicación al arma2 días
Publicada en NVD5 nov
1ª PoC+2d
A flaw was found in the SAML HTTP-Redirect binding implementation of Keycloak. The issue occurs because the server processes percent-encoded parameter names (like %53AMLResponse) while the signature verification logic only checks literal parameter names. An attacker can use this discrepancy to provide a crafted, unsigned SAML message that the server processes instead of a legitimately signed one, leading to full account takeover of federated users.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Productos afectados
Red Hat · Red Hat build of Keycloak 26.6Red Hat · Red Hat build of Keycloak 26.6.9Red Hat · Red Hat Single Sign-On 7
⚠ Recursos públicos, para evaluar la exposición de sistemas que controlas o estás autorizado a probar. Prueba solo con autorización.
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