CVE-2026-16089: Red Hat Build Of Keycloak

Medium severity, CVSS 5.9. EPSS: 0.3% chance of exploitation in the next 30 days.

A flaw was found in the keycloak-services component of Red Hat Build of Keycloak. The issue occurs because OAuth 2.0 authorization codes are not properly bound to the client that originally requested them. An attacker who can intercept an authorization code can modify it to be redeemed by their own client, potentially allowing them to obtain access tokens for a victim's identity.

Affected products

• Red Hat Build Of Keycloak: affected versions not specified

Published 2026-07-17. Last modified 2026-09-16.