Privilege escalation in Red Hat Build Of Keycloak 26.4
CVE-2026-3121
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (41.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: -0.001
Affected products
- Red Hat Build Of Keycloak 26.4 — versions 26.4.11-1, 26.4-14
- Red Hat Build Of Keycloak 26.4.11
- Red Hat Jboss Enterprise Application Platform 8
- Red Hat Jboss Enterprise Application Platform Expansion Pack
- Red Hat Single Sign-On 7
- Red Hat Build Of Keycloak
- Red Hat Jboss Enterprise Application Platform — versions 8.0.0
- Red Hat Jboss Enterprise Application Platform Expansion Pack
- Red Hat Single Sign-On — versions 7.0
Weakness classification (CWE)
References
- access.redhat.com/errata/RHSA-2026:6477 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:6478 (vendor-advisory)
- access.redhat.com/security/cve/CVE-2026-3121 (vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-3121?
- CVE-2026-3121 is a medium-severity vulnerability in Red Hat Build Of Keycloak 26.4, classified under Incorrect Privilege Assignment. CVSS score: 6.5/10. Published 2026-03-26.
- How severe is CVE-2026-3121?
- Medium severity. CVSS v3 base score is 6.5 out of 10.