CVE-2026-117691

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.

Referanslar

• https://access.redhat.com/security/cve/CVE-2026-117691
• https://bugzilla.redhat.com/show_bug.cgi?id=2561977