PT-2026-66730 · Red Hat · Red Hat Build Of Keycloak+3

CVE-2026-18218 · Published 2026-07-31 · Updated 2026-07-31

Mitre

CVSS v3.1

4.2

Medium

Base vector

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

A flaw was found in the TokenManager component of the Keycloak identity management service. When an administrator attempts to revoke tokens for a specific application (client) using a "not-before" policy, the revocation may be silently ignored if the overall security realm already has an older, non-zero revocation policy in place. This issue can allow previously issued tokens to remain valid for refreshing sessions and accessing user information even after an administrator has attempted to invalidate them. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2026-18218

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-2026-18218 · Security Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2508313 · Note
• https://access.redhat.com/security/cve/CVE-2026-18218 · Note