RHSA-2026:50848: Important: Red Hat build of Keycloak 26.6.5 Security Update
Important: Red Hat build of Keycloak 26.6.5 Security Update
Other sources
Red Hat build of Keycloak 26.6.5 is a standalone server, based onthe Keycloak project, that provides authentication andstandards-based single sign-on capabilities for web and mobileapplications.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)
— Red Hat
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
redhat/keycloak (Red Hat build of Keycloak)to a version that resolves this vulnerability.Fixed in 26.6.5 - Operational
Back up the existing Red Hat build of Keycloak installation before applying the security update, including all applications, configuration files, databases, and database settings.
Event History
Frequently Asked Questions
What is the severity of RHSA-2026:50848?
The severity of RHSA-2026:50848 is rated as important.
What vulnerability does RHSA-2026:50848 address?
RHSA-2026:50848 addresses an authorization bypass vulnerability in the admin-ui-ext bulk role-mapping-delete endpoints.
How do I fix RHSA-2026:50848?
To fix RHSA-2026:50848, you need to update to Red Hat build of Keycloak version 26.6.5 or later.
Who is affected by RHSA-2026:50848?
Organizations using Red Hat Keycloak versions prior to 26.6.5 are affected by RHSA-2026:50848.
When was RHSA-2026:50848 published?
RHSA-2026:50848 was published on August 5, 2026.