CVE-2026-18569

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.

Overview

State: PUBLISHED
Assigner (CNA): redhat
CVSS severity: LOW
CVSS score: 3.7 / 10
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Effective score: 3.7 / 10 LOW source: CNA overview
CWE(s): CWE-347
Reserved: 2026-08-02
Published: 2026-08-04 05:13 UTC
Last updated: 2026-08-04 14:40 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/18xxx/CVE-2026-18569.json

Affected products (6)

Vendor	Product	Versions	Platforms
Red Hat	Red Hat Build of Keycloak	—	—
Red Hat	Red Hat Build of Keycloak	—	—
Red Hat	Red Hat Build of Keycloak	—	—
Red Hat	Red Hat Data Grid 8	—	—
Red Hat	Red Hat JBoss Enterprise Application Platform Expansion Pack	—	—
Red Hat	Red Hat Single Sign-On 7	—	—

Vendor references (2)

References embedded in the original CVE record by the assigning CNA.

https://access.redhat.com/security/cve/CVE-2026-18569 vdb-entryx_refsource_REDHAT
RHBZ#2509755 issue-trackingx_refsource_REDHAT

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-18569.json.

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