Red Hat Security Advisory: Red Hat build of Keycloak 26.4.14 Images Security Update
Red Hat build of Keycloak is an integrated sign-on solution, available as a Red Hat JBoss Middleware for OpenShift containerized image. The Red Hat build of Keycloak for OpenShift image provides an authentication server that you can use to log in centrally, log out, and register. You can also manage user accounts for web applications, mobile applications, and RESTful web services. Red Hat build of Keycloak Operator for OpenShift simplifies deployment and management of Keycloak 26.4.14 clusters. This erratum releases new images for Red Hat build of Keycloak 26.4.14 for use within the OpenShift Container Platform cloud computing Platform-as-a-Service (PaaS) for on-premise or private cloud deployments, aligning with the standalone product release. Security fixes: * Admin UI extension brute-force-user endpoint bypasses FGAPv2 user view restrictions (CVE-2026-14209) * FGAP v2 client scope assignment bypass via ClientResource (CVE-2026-14614) * FGAP v2 parent group children endpoint bypasses per-child view permission filter (CVE-2026-14615) * DCR protocol mapper type-swap policy bypass allows privilege escalation (CVE-2026-15572) * Authorization bypass via unnormalized URI matching in PathMatcher (CVE-2026-15573) * LDAP entry-DN user search bypasses configured users DN boundary (CVE-2026-16071) * Default DCR policy allows role forgery via User Property mappers (CVE-2026-16102) * Quarkus REST - Unbounded multipart MIME part-header accumulation allows remote OOM denial of service (CVE-2026-16308) * SAML IdP-initiated broker login bypasses link-only restriction (CVE-2026-16442) * SAML broker metadata import disables response signature validation (CVE-2026-16443) * Privilege escalation through hardcoded role mapper injection (CVE-2026-4629) * Arbitrary code execution via PolymorphicTypeValidator bypass (CVE-2026-54512) * Security bypass allows arbitrary code execution (CVE-2026-54513) * HTTP Parameter Pollution in OIDC redirect URI allows response parameter duplication - #GHI-604 (CVE-2026-9689) * Security policy bypass in JWE-encrypted request object processing (CVE-2026-9793) * Brute-force protection bypass in CIBA flow (CVE-2026-9798) * Authorization bypass via incorrect URI comparison (CVE-2026-9800) * Brute-force protection bypass in CIBA flow (CVE-2026-9798)
AI Analysis
Technical Summary
The Red Hat build of Keycloak 26.4.14 contains multiple security vulnerabilities impacting authentication, authorization, and code execution controls. Notable issues include privilege escalation via hardcoded role mapper injection (CVE-2026-4629), arbitrary code execution through PolymorphicTypeValidator bypass (CVE-2026-54512, CVE-2026-54513), authorization bypasses via unnormalized URI matching and incorrect URI comparison (CVE-2026-15573, CVE-2026-9800), and denial of service via unbounded multipart MIME part-header accumulation (CVE-2026-16308). Additional flaws include bypasses of FGAPv2 user view restrictions, client scope assignment, and brute-force protection in CIBA flow. The update provides new container images aligned with the standalone product release for OpenShift Container Platform. No known exploits in the wild have been reported at this time.
Potential Impact
Successful exploitation of these vulnerabilities could allow attackers to escalate privileges, bypass authorization controls, execute arbitrary code remotely, cause denial of service conditions, and bypass brute-force protections. This could compromise the integrity and availability of authentication services and potentially lead to unauthorized access to protected resources managed by Keycloak. The vulnerabilities affect critical components such as the admin UI, client resource management, LDAP user searches, SAML broker login, and OpenID Connect redirect handling.
Mitigation Recommendations
Red Hat has released updated packages and container images for Red Hat build of Keycloak 26.4.14 that address these vulnerabilities. Users should back up their existing installations, including all applications, configuration files, and databases, before applying the update. Applying the official update is the recommended remediation. No alternative mitigations or workarounds are specified in the vendor advisory.
Red Hat Security Advisory: Red Hat build of Keycloak 26.4.14 Images Security Update
Description
Red Hat build of Keycloak is an integrated sign-on solution, available as a Red Hat JBoss Middleware for OpenShift containerized image. The Red Hat build of Keycloak for OpenShift image provides an authentication server that you can use to log in centrally, log out, and register. You can also manage user accounts for web applications, mobile applications, and RESTful web services. Red Hat build of Keycloak Operator for OpenShift simplifies deployment and management of Keycloak 26.4.14 clusters. This erratum releases new images for Red Hat build of Keycloak 26.4.14 for use within the OpenShift Container Platform cloud computing Platform-as-a-Service (PaaS) for on-premise or private cloud deployments, aligning with the standalone product release. Security fixes: * Admin UI extension brute-force-user endpoint bypasses FGAPv2 user view restrictions (CVE-2026-14209) * FGAP v2 client scope assignment bypass via ClientResource (CVE-2026-14614) * FGAP v2 parent group children endpoint bypasses per-child view permission filter (CVE-2026-14615) * DCR protocol mapper type-swap policy bypass allows privilege escalation (CVE-2026-15572) * Authorization bypass via unnormalized URI matching in PathMatcher (CVE-2026-15573) * LDAP entry-DN user search bypasses configured users DN boundary (CVE-2026-16071) * Default DCR policy allows role forgery via User Property mappers (CVE-2026-16102) * Quarkus REST - Unbounded multipart MIME part-header accumulation allows remote OOM denial of service (CVE-2026-16308) * SAML IdP-initiated broker login bypasses link-only restriction (CVE-2026-16442) * SAML broker metadata import disables response signature validation (CVE-2026-16443) * Privilege escalation through hardcoded role mapper injection (CVE-2026-4629) * Arbitrary code execution via PolymorphicTypeValidator bypass (CVE-2026-54512) * Security bypass allows arbitrary code execution (CVE-2026-54513) * HTTP Parameter Pollution in OIDC redirect URI allows response parameter duplication - #GHI-604 (CVE-2026-9689) * Security policy bypass in JWE-encrypted request object processing (CVE-2026-9793) * Brute-force protection bypass in CIBA flow (CVE-2026-9798) * Authorization bypass via incorrect URI comparison (CVE-2026-9800) * Brute-force protection bypass in CIBA flow (CVE-2026-9798)
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Red Hat build of Keycloak 26.4.14 contains multiple security vulnerabilities impacting authentication, authorization, and code execution controls. Notable issues include privilege escalation via hardcoded role mapper injection (CVE-2026-4629), arbitrary code execution through PolymorphicTypeValidator bypass (CVE-2026-54512, CVE-2026-54513), authorization bypasses via unnormalized URI matching and incorrect URI comparison (CVE-2026-15573, CVE-2026-9800), and denial of service via unbounded multipart MIME part-header accumulation (CVE-2026-16308). Additional flaws include bypasses of FGAPv2 user view restrictions, client scope assignment, and brute-force protection in CIBA flow. The update provides new container images aligned with the standalone product release for OpenShift Container Platform. No known exploits in the wild have been reported at this time.
Potential Impact
Successful exploitation of these vulnerabilities could allow attackers to escalate privileges, bypass authorization controls, execute arbitrary code remotely, cause denial of service conditions, and bypass brute-force protections. This could compromise the integrity and availability of authentication services and potentially lead to unauthorized access to protected resources managed by Keycloak. The vulnerabilities affect critical components such as the admin UI, client resource management, LDAP user searches, SAML broker login, and OpenID Connect redirect handling.
Mitigation Recommendations
Red Hat has released updated packages and container images for Red Hat build of Keycloak 26.4.14 that address these vulnerabilities. Users should back up their existing installations, including all applications, configuration files, and databases, before applying the update. Applying the official update is the recommended remediation. No alternative mitigations or workarounds are specified in the vendor 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-2026:50846
- Cve Count
- 17
- Additional Cves
- ["CVE-2026-9689","CVE-2026-9793","CVE-2026-9798","CVE-2026-9800","CVE-2026-14209","CVE-2026-14614","CVE-2026-14615","CVE-2026-15572","CVE-2026-15573","CVE-2026-16071","CVE-2026-16102","CVE-2026-16308","CVE-2026-16442","CVE-2026-16443","CVE-2026-54512","CVE-2026-54513"]
- State
- PUBLISHED
Threat ID: 6a73851abf8831d5394ef070
Added to database: 08/05/2026, 18:46:50 UTC
Last enriched: 08/12/2026, 19:33:53 UTC
Last updated: 09/18/2026, 22:01:35 UTC
Views: 78
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