CVE-2026-15943: Red Hat Build Of Keycloak

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

A flaw was found in the Keycloak keycloak-services component, which handles the management of identity providers. The issue occurs when a delegated administrator updates an OIDC identity provider using a masked client secret sentinel value. Due to improper validation, Keycloak reuses the existing real secret even if security-sensitive fields like the token URL have been changed, allowing an attacker to redirect and capture the secret.

Affected products

• Red Hat Build Of Keycloak: affected versions not specified

Published 2026-07-17. Last modified 2026-08-09.