PT-2026-44187 · Red Hat · Red Hat Build Of Keycloak

Published 2026-05-28 · Updated 2026-05-28 · CVE-2026-9796

Mitre

CVSS v3.1

6.5

Medium

Base vector

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

A flaw was found in Keycloak. An authenticated administrator with the manage-clients role can exploit a Time-of-check to time-of-use (TOCTOU) vulnerability in the name-based admin role checks. This allows the attacker to escalate their privileges to realm-admin for all users within the realm, granting them extensive control over the system. The composite role relationship persists even after the attacker's own permissions are revoked and across system reboots.

Fix

Time Of Check To Time Of Use

Weakness Enumeration

CWE-367

Related Identifiers

CVE-2026-9796

Affected Products

Red Hat Build Of Keycloak

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-9796 · Security Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2482464 · Note
• https://access.redhat.com/security/cve/CVE-2026-9796 · Note