Red Hat Security Advisory: Red Hat build of Keycloak 26.4.10 Update
Red Hat build of Keycloak 26.4.10 contains multiple security vulnerabilities affecting its SAML broker, identity provider enforcement, encrypted assertion validation, Docker Registry protocol client checks, and authorization header parsing. These issues include authentication bypasses, unauthorized access, denial of service, and potential security control bypass. The advisory addresses eight CVEs with high severity and recommends updating to the fixed version.
AI Analysis
Technical Summary
This advisory covers eight security vulnerabilities in Red Hat build of Keycloak 26.4.10, a standalone authentication and single sign-on server. The vulnerabilities include authentication bypasses due to disabled SAML clients and identity providers (CVE-2026-3047, CVE-2026-3009, CVE-2026-2603), improper validation of encrypted SAML assertions allowing unauthorized access (CVE-2026-2092), missing checks on disabled clients for Docker Registry protocol (CVE-2026-2733), denial of service from excessive SAMLRequest decompression (CVE-2026-2575), response delays from unchecked NotOnOrAfter timestamps in SAML SubjectConfirmationData (CVE-2026-1190), and potential security control bypass via authorization header parsing (CVE-2026-0707). These collectively impact authentication integrity and availability.
Potential Impact
The vulnerabilities can lead to authentication bypasses, unauthorized access to protected resources, denial of service conditions, and potential security control bypasses. This compromises the security guarantees of the Keycloak authentication server, potentially allowing attackers to impersonate users or disrupt service availability.
Mitigation Recommendations
Red Hat has released an updated build of Keycloak 26.4.10 containing fixes for these vulnerabilities. Users should back up their existing installations and apply the update from the Red Hat Customer Portal as soon as possible to remediate these issues. No additional mitigations are specified in the advisory.
Red Hat Security Advisory: Red Hat build of Keycloak 26.4.10 Update
Description
Red Hat build of Keycloak 26.4.10 contains multiple security vulnerabilities affecting its SAML broker, identity provider enforcement, encrypted assertion validation, Docker Registry protocol client checks, and authorization header parsing. These issues include authentication bypasses, unauthorized access, denial of service, and potential security control bypass. The advisory addresses eight CVEs with high severity and recommends updating to the fixed version.
CVSS v3.1
Score 5.3medium
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers eight security vulnerabilities in Red Hat build of Keycloak 26.4.10, a standalone authentication and single sign-on server. The vulnerabilities include authentication bypasses due to disabled SAML clients and identity providers (CVE-2026-3047, CVE-2026-3009, CVE-2026-2603), improper validation of encrypted SAML assertions allowing unauthorized access (CVE-2026-2092), missing checks on disabled clients for Docker Registry protocol (CVE-2026-2733), denial of service from excessive SAMLRequest decompression (CVE-2026-2575), response delays from unchecked NotOnOrAfter timestamps in SAML SubjectConfirmationData (CVE-2026-1190), and potential security control bypass via authorization header parsing (CVE-2026-0707). These collectively impact authentication integrity and availability.
Potential Impact
The vulnerabilities can lead to authentication bypasses, unauthorized access to protected resources, denial of service conditions, and potential security control bypasses. This compromises the security guarantees of the Keycloak authentication server, potentially allowing attackers to impersonate users or disrupt service availability.
Mitigation Recommendations
Red Hat has released an updated build of Keycloak 26.4.10 containing fixes for these vulnerabilities. Users should back up their existing installations and apply the update from the Red Hat Customer Portal as soon as possible to remediate these issues. No additional mitigations are specified in the advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:3947
- Cve Count
- 8
- Additional Cves
- ["CVE-2026-1190","CVE-2026-2092","CVE-2026-2575","CVE-2026-2603","CVE-2026-2733","CVE-2026-3009","CVE-2026-3047"]
- Cvss Version
- 3.1
Threat ID: 6a273213e29bf47b509c0905
Added to database: 06/08/2026, 21:20:19 UTC
Last enriched: 06/27/2026, 23:44:48 UTC
Last updated: 07/31/2026, 19:24:50 UTC
Views: 91
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