Red Hat Security Advisory: Red Hat build of Keycloak 26.2.15 Update
Red Hat build of Keycloak 26.2.15 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications. Security fixes: * Information disclosure due to redirect_uri validation bypass (CVE-2026-3872) * Replay of action tokens via improper handling of single-use entries (CVE-2026-4325) * UMA policy bypass allows authenticated users to gain unauthorized access to victim-owned resources ( CVE-2026-4636) * Privilege escalation via forged authorization codes due to SingleUseObjectProvider isolation flaw (CVE-2026-4282) * Denial of Service via excessive processing of OpenID Connect scope parameters (CVE-2026-4634)
Red Hat Security Advisory: Red Hat build of Keycloak 26.2.15 Update
Description
Red Hat build of Keycloak 26.2.15 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications. Security fixes: * Information disclosure due to redirect_uri validation bypass (CVE-2026-3872) * Replay of action tokens via improper handling of single-use entries (CVE-2026-4325) * UMA policy bypass allows authenticated users to gain unauthorized access to victim-owned resources ( CVE-2026-4636) * Privilege escalation via forged authorization codes due to SingleUseObjectProvider isolation flaw (CVE-2026-4282) * Denial of Service via excessive processing of OpenID Connect scope parameters (CVE-2026-4634)
Affected software
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:6475
- Cve Count
- 5
- Additional Cves
- ["CVE-2026-4282","CVE-2026-4325","CVE-2026-4634","CVE-2026-4636"]
- State
- PUBLISHED
Threat ID: 6a4049d727e9c7971982e423
Added to database: 06/27/2026, 22:08:23 UTC
Last enriched: 08/04/2026, 15:27:11 UTC
Last updated: 09/11/2026, 22:06:33 UTC
Views: 110
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.