← Vulnerability feed

Vulnerability record · CVE-2026-3121 · published 26 March 2026

CVE-2026-3121: Redhat build of keycloak vulnerability

Redhat · Build Of Keycloak

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.

7.2 CVSS 3.1 High EPSS 0.53% · top 57.3% CWE-266 · CWE-266
7.2CVSS 3.1 base score
0.53%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/errata/RHSA-2026:6477
https://access.redhat.com/errata/RHSA-2026:6478
https://access.redhat.com/security/cve/CVE-2026-3121 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442277 Issue TrackingVendor Advisory

Track CVE-2026-3121 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2017-12149JBoss HTTP Invoker deserialization allows remote code executionThe ReadOnlyAccessFilter doFilter method in the JBoss HTTP Invoker deserializes untrusted data without restricting which classes can be loaded. An un…KEVEPSS 91%analysed8.8CVE-2010-1871JBoss Seam 2 EL injection allows remote code executionJBoss Seam 2, as shipped in JBoss Enterprise Application Platform 4.3.0 for Red Hat Linux, fails to sanitize input used in JBoss Expression Language …KEVEPSS 83%analysed8.1CVE-2017-12617Apache Tomcat Default Servlet JSP upload leads to remote code executionApache Tomcat with HTTP PUT enabled (for example, the Default servlet readonly parameter set to false) allows an attacker to upload a JSP file throug…KEVEPSS 100%analysed7.5CVE-2023-44487HTTP/2 Rapid Reset stream cancellation denial of serviceThe HTTP/2 protocol permits a client to cancel many streams quickly, and the server's handling of those resets consumes disproportionate resources. T…KEVEPSS 100%analysed7.5CVE-2010-1428JBoss EAP Web Console access control bypass via non-GET/POST methodsThe Web Console in JBoss Enterprise Application Platform enforces access control only for GET and POST requests, so any other HTTP method bypasses th…KEVEPSS 62%analysed5.3CVE-2010-0738JBoss JMX-Console access control bypass via non-GET/POST HTTP methodsThe JMX-Console web application in Red Hat JBoss EAP 4.2 before 4.2.0.CP09 and 4.3 before 4.3.0.CP08 enforces access control only for GET and POST re…KEVEPSS 79%analysed10.0CVE-2018-14721Fasterxml jackson-databind server-side request forgery (ssrf) vulnerabilityFasterXML jackson-databind 2.x before 2.9.7 might allow remote attackers to conduct server-side request forgery (SSRF) attacks by leveraging failure …EPSS 10%9.8CVE-2026-16442Redhat build of keycloak origin validation error vulnerabilityA flaw was found in the SAML broker component of Keycloak, which is used to manage identity federation and user authentication. The issue occurs beca…EPSS 0.31%

Source: NIST National Vulnerability Database (record CVE-2026-3121), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.