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CVE-2026-3121

Keycloak: org.keycloak/keycloak-services: keycloak: privilege escalation via manage-clients permission

6.5 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
High
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
None

Exploit likelihood

0.48%Up 0.5 points since Mar 27, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.5

Keycloak: org.keycloak/keycloak-services: keycloak: privilege escalation via manage-clients permission

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.

Record
CVE-2026-3121
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Weakness
CWE-266
Updated
2026-11-02
EUVDEUVD-2026-16307 6.5

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.

Record
EUVD-2026-16307
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-7xf9-4jfc-wgm4 6.5

Keycloak: manage-clients permission escalates to full realm admin access

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.

Record
GHSA-7xf9-4jfc-wgm4
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Weakness
CWE-266
Updated
2026-11-02
NVD 6.5

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.

Record
CVE-2026-3121
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
CVSS 3.1
7.2 HighCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-266
Updated
2026-11-02
OSVGHSA-7xf9-4jfc-wgm4 6.5

Keycloak: manage-clients permission escalates to full realm admin access

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.

Record
GHSA-7xf9-4jfc-wgm4
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Weakness
CWE-266
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
org.keycloak:keycloak-services
Maven
before 26.5.6
26.5.6
org.keycloak:keycloak-services
Maven
before 26.5.6, plus listed versions
1.0-alpha-11.0-alpha-1-120620131.0-alpha-21.0-alpha-31.0-alpha-4
Show 45 moreShow less
1.0-beta-11.0-beta-1-201505211.0-beta-1-201505231.0-beta-21.0-beta-31.0-beta-41.0-final1.0-rc-11.0-rc-21.0.1.Final1.0.2.Final1.0.3.Final1.0.4.Final1.0.5.Final1.1.0.Beta11.1.0.Beta21.1.0.Final1.1.1.Final1.2.0.Beta11.2.0.CR11.2.0.Final1.3.0.Final1.3.1.Final1.4.0.Final1.5.0-Final1.5.0.Final1.5.1.Final1.6.0.Final1.6.1.Final1.7.0.CR11.7.0.Final1.8.0.Alpha11.8.0.CR11.8.0.CR21.8.0.CR31.8.0.Final1.8.1.Final1.9.0.CR11.9.0.Final1.9.1.Final1.9.2.Final1.9.3.Final1.9.4.Final1.9.5.Final1.9.7.Final
26.5.6

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-3121 is a medium vulnerability (CVSS 6.5) in Red Hat Build Of Keycloak 26.4, published March 26, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.48%, the 41st percentile. Fixed in org.keycloak:keycloak-services 26.5.6.

References

This page doesn't list everything

Left out here: 172 versions. The JSON record has them.

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