PT-2026-60798 · Red Hat · Red Hat Build Of Keycloak+3

CVE-2026-16093 · Published 2026-07-17 · Updated 2026-07-17

NVD

CVSS v3.1

5.4

Medium

Base vector

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

Keycloak provides a mechanism called Client Policies to enforce security requirements on clients, such as requiring them to use signed JWTs for authentication. A flaw was discovered where this enforcement can be bypassed. An attacker with valid client credentials can provide a fake, unsigned assertion header that tricks the system into thinking the policy requirements have been met. This allows the attacker to authenticate using simpler methods like a client secret even when the administrator has mandated more secure, signed assertions.

Fix

Weakness Enumeration

CWE-807

Related Identifiers

CVE-2026-16093

Affected Products

Red Hat Build Of Keycloak

Red Hat Data Grid 8

Red Hat Jboss Enterprise Application Platform Expansion Pack

Red Hat Single Sign-On 7

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-16093 · Security Note
• https://access.redhat.com/security/cve/CVE-2026-16093 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2501729 · Note