PT-2026-55152 · Maven · Org.Keycloak:Keycloak-Services

Published 2026-05-28 · Updated 2026-05-28

OSV

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

GHSA-PQ65-77RC-7R8C

Affected Products

Org.Keycloak:Keycloak-Services

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-9796 · Security Note
• https://osv.dev/vulnerability/GHSA-pq65-77rc-7r8c · Vendor Advisory
• https://github.com/keycloak/keycloak/issues/49427 · Note
• https://github.com/keycloak/keycloak/commit/39cb8de54c8517efeda4baa8bc314fd40e9c6934 · Note
• https://github.com/keycloak/keycloak/pull/49624 · Note
• https://github.com/keycloak/keycloak · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2482464 · Note
• https://access.redhat.com/security/cve/CVE-2026-9796 · Note