VULNERABILITY INTELLIGENCE

CVE-2026-18569

CVSS score3.7 LOW
EPSS probability0.25%
CISA KEVNot currently listed
Published2026-08-04
Last modified2026-08-10
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Description

A flaw was found in the backchannel logout endpoint of the keycloak-services component, which is part of the Red Hat Build of Keycloak. This component handles authentication and session management for applications. The issue occurs when an OIDC identity provider is configured to skip signature validation. In this specific setup, the system incorrectly accepts logout requests that have no cryptographic signature. An attacker who knows certain technical details about a user's session can use this flaw to force that user to be logged out, potentially disrupting their work.

Weakness classification

  • secalert@redhat.com: CWE-347

Primary references