CVE-2026-3121

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "product": "keycloak", "vendor": "keycloak"}], "analysis": {"en": {"generated_at": "2026-04-15T22:37:56.866394+00:00", "value": {"mitigation_remediation": ["Apply the Red\u202fHat security updates RHSA\u20112026:6477 or RHSA\u20112026:6478, which patch the Keycloak role\u2011mapping logic to separate manage\u2011clients from manage\u2011permissions.", "Revoke the manage\u2011clients role from any user who does not also require full permission\u2011modification rights, or reconfigure the role assignment to avoid implicit elevation to manage\u2011permissions.", "Audit all realm\u2011level administrator accounts and restrict unnecessary administrator privileges, ensuring that only users with genuine operational need retain management rights."], "summary": {"action": "Immediate Patch", "impact": "Privilege Escalation"}, "threat_synthesis": {"affected_systems": "The flaw impacts several Red\u202fHat\u2011sponsored products that include Keycloak 26.4 (also specifically 26.4.11), Red\u202fHat JBoss Enterprise Application Platform\u202f8, the JBoss Enterprise Application Platform Expansion Pack, and Red\u202fHat Single\u202fSign\u2011On\u202f7. These builds run on Red\u202fHat Enterprise Linux\u202f9 or earlier releases; any installation of the listed versions hosts the vulnerable role\u2011mapping logic unless the relevant security updates are applied.", "description_and_impact": "A misconfiguration in Keycloak\u2019s role mapping logic allows an administrator who has the manage\u2011clients permission to inadvertently have the same level of access as those with manage\u2011permissions. This flaw gives the privileged user the ability to modify roles, change user permissions, and execute other administrative functions within the realm, effectively elevating their privileges. Identified as CWE\u2011266, the vulnerability represents an elevation of privilege weakness that can be used to subvert the security model of the realm without requiring additional exploitation steps.", "risk_and_exploitability": "The CVSS score of 6.5 indicates a medium\u2011to\u2011high severity vulnerability. EPSS is less than 1\u202f%, reflecting a very low probability of exploitation at the time of analysis. The vulnerability is not listed in CISA\u2019s KEV catalogue. The attack requires an existing realm\u2011level administrator who has been granted the manage\u2011clients permission; no external network or service exploitation is documented, so the threat is limited to environments where such permissions are misconfigured. If exploited, the attacker gains the ability to remodel the realm\u2019s permission structure, potentially taking over user accounts and adjusting security settings."}}}}, "created": "2026-02-25T11:45:24.261051+00:00", "updated": "2026-04-15T22:45:16.438338+00:00", "vendors": ["keycloak", "keycloak$PRODUCT$keycloak"]}