CVE-2026-3121 Keycloak: org.keycloak/keycloak-services: keycloak: privilege escalation via manage-clients permission
Administrators with manage-clients permission can escalate privileges to manage roles and users when realm-level admin permissions are enabled.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-3121?
CVE-2026-3121 is a medium-severity vulnerability in Redhat Build of Keycloak, published on 26 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A flaw was found in Keycloak. An administrator with `manage-clients` permission can exploit a misconfiguration where this permission is equivalent to `manage-permissions`. This allows the administrator to escalate privileges and gain control over roles, users, or other administrative functions within the realm. This privilege escalation can occur when admin permissions are enabled at the realm level.
Weakness: CWE-266
Which versions are affected by CVE-2026-3121?
2 open source packages ship an affected version, including org.keycloak:keycloak-services. It affects 4 products.
| Package | Affected | Fixed in |
|---|---|---|
org.keycloak:keycloak-services Maven | All versions | 26.5.6 |
org.keycloak:keycloak-services Maven | All versions | 26.5.6 |
Products include Redhat Build of Keycloak, Redhat Jboss Enterprise Application Platform, Redhat Jboss Enterprise Application Platform Expansion Pack, Redhat Single Sign-On.
How do I fix CVE-2026-3121?
Upgrade org.keycloak:keycloak-services to 26.5.6 or later.
Is CVE-2026-3121 being exploited?
There is no known exploitation of CVE-2026-3121 in the wild and no public exploit code.
Other vulnerabilities in Redhat Build of Keycloak
- CVE-2026-15572 Keycloak-services: keycloak-services: dcr protocol mapper type-swap policy bypass allows privilege escalation
- CVE-2026-3047 Keycloak SAML Broken has Authentication Bypass by Primary Weakness
- CVE-2026-15573 Keycloak-services: keycloak-services: authorization bypass via unnormalized uri matching in pathmatcher
- CVE-2026-16102 Keycloak-services: keycloak-services: default dcr policy allows role forgery via user property mappers
- CVE-2026-1609 Org.keycloak/keycloak-quarkus-server: keycloak: unauthorized access via jwt authorization grant with disabled users
Sources
Also known as ECHO-73ab-600d-62be, GHSA-7xf9-4jfc-wgm4, MINI-c298-r83g-6vmc, MINI-j996-x997-3v6w.