Red Hat Security Advisory: Red Hat build of Keycloak 26.6.5 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 26.6.5 clusters. This erratum releases new images for Red Hat build of Keycloak 26.6.5 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: * Authorization Bypass vulnerability in the admin-ui-ext bulk role-mapping-delete endpoints of Keycloak (CVE-2026-11986) * 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) * Unbounded metric cardinality in user event metrics via request-controlled error text (CVE-2026-16100) * 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) * Denial of Service via specially crafted gRPC requests (CVE-2026-40983) * Denial of Service via specially crafted HTTP requests (CVE-2026-40984) * 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)
AI Analysis
Technical Summary
The Red Hat build of Keycloak 26.6.5 contains numerous security vulnerabilities affecting authentication and authorization mechanisms, protocol handling, and resource management. Notable issues include authorization bypass in admin UI endpoints (CVE-2026-11986), privilege escalation via DCR protocol mapper type-swap (CVE-2026-15572), denial of service via unbounded multipart MIME headers and crafted gRPC/HTTP requests (CVE-2026-16308, CVE-2026-40983, CVE-2026-40984), arbitrary code execution through PolymorphicTypeValidator bypass and security bypasses (CVE-2026-54512, CVE-2026-54513), and HTTP parameter pollution in OIDC redirect URIs (CVE-2026-9689). The update provides new images for standalone and OpenShift containerized deployments to mitigate these issues.
Potential Impact
These vulnerabilities can lead to unauthorized access, privilege escalation, denial of service conditions, and arbitrary code execution within Keycloak authentication services. Exploitation could compromise authentication integrity, user data confidentiality, and service availability. The presence of multiple authorization bypasses and security bypasses increases the risk of attackers gaining elevated privileges or bypassing security controls. Denial of service vulnerabilities could disrupt authentication services, impacting dependent applications.
Mitigation Recommendations
Red Hat has released updated packages and container images for Keycloak 26.6.5 that address these vulnerabilities. Users should back up their existing installations, including applications, configurations, and databases, before applying the update. Applying the official Red Hat update is the recommended mitigation. No other specific mitigations or workarounds are indicated in the vendor advisory. Patch status is confirmed by the availability of updated packages and images from Red Hat.
Red Hat Security Advisory: Red Hat build of Keycloak 26.6.5 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 26.6.5 clusters. This erratum releases new images for Red Hat build of Keycloak 26.6.5 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: * Authorization Bypass vulnerability in the admin-ui-ext bulk role-mapping-delete endpoints of Keycloak (CVE-2026-11986) * 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) * Unbounded metric cardinality in user event metrics via request-controlled error text (CVE-2026-16100) * 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) * Denial of Service via specially crafted gRPC requests (CVE-2026-40983) * Denial of Service via specially crafted HTTP requests (CVE-2026-40984) * 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)
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Red Hat build of Keycloak 26.6.5 contains numerous security vulnerabilities affecting authentication and authorization mechanisms, protocol handling, and resource management. Notable issues include authorization bypass in admin UI endpoints (CVE-2026-11986), privilege escalation via DCR protocol mapper type-swap (CVE-2026-15572), denial of service via unbounded multipart MIME headers and crafted gRPC/HTTP requests (CVE-2026-16308, CVE-2026-40983, CVE-2026-40984), arbitrary code execution through PolymorphicTypeValidator bypass and security bypasses (CVE-2026-54512, CVE-2026-54513), and HTTP parameter pollution in OIDC redirect URIs (CVE-2026-9689). The update provides new images for standalone and OpenShift containerized deployments to mitigate these issues.
Potential Impact
These vulnerabilities can lead to unauthorized access, privilege escalation, denial of service conditions, and arbitrary code execution within Keycloak authentication services. Exploitation could compromise authentication integrity, user data confidentiality, and service availability. The presence of multiple authorization bypasses and security bypasses increases the risk of attackers gaining elevated privileges or bypassing security controls. Denial of service vulnerabilities could disrupt authentication services, impacting dependent applications.
Mitigation Recommendations
Red Hat has released updated packages and container images for Keycloak 26.6.5 that address these vulnerabilities. Users should back up their existing installations, including applications, configurations, and databases, before applying the update. Applying the official Red Hat update is the recommended mitigation. No other specific mitigations or workarounds are indicated in the vendor advisory. Patch status is confirmed by the availability of updated packages and images from Red Hat.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:50848
- Cve Count
- 19
- Additional Cves
- ["CVE-2026-9793","CVE-2026-9798","CVE-2026-11986","CVE-2026-14209","CVE-2026-14614","CVE-2026-14615","CVE-2026-15572","CVE-2026-15573","CVE-2026-16071","CVE-2026-16100","CVE-2026-16102","CVE-2026-16308","CVE-2026-16442","CVE-2026-16443","CVE-2026-40983","CVE-2026-40984","CVE-2026-54512","CVE-2026-54513"]
- State
- PUBLISHED
Threat ID: 6a73851abf8831d5394ef06b
Added to database: 08/05/2026, 18:46:50 UTC
Last enriched: 08/12/2026, 19:33:39 UTC
Last updated: 09/19/2026, 11:46:50 UTC
Views: 91
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