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.

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 contr…

EPSS: 0.000 (1.9th percentile) — read the EPSS interpretation.

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.

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

Weakness classification (CWE)

CWE-266 — Incorrect Privilege Assignment

References

RHSA-2026:6477 (vendor-advisory, x_refsource_REDHAT)
RHSA-2026:6478 (vendor-advisory, x_refsource_REDHAT)
access.redhat.com/security/cve/CVE-2026-3121 (vdb-entry, x_refsource_REDHAT)
RHBZ#2442277 (issue-tracking, x_refsource_REDHAT)

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.