CVE-2026-3121
Keycloak: manage-clients permission escalates to full realm admin access
6.5
MEDIUM
CVSS 3.1
EPSS 0.01%
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.
How to fix CVE-2026-3121
To remediate CVE-2026-3121, upgrade the affected package to a fixed version below.
- —upgrade to 26.5.6 or later
Is CVE-2026-3121 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 26.5.6
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N |