CVE-2026-9796

A flaw was found in Keycloak. An authenticated administrator with the `manage-clients` role can exploit a Time-of-check to time-of-use (TOCTOU) vulnerability in the name-based admin role checks. This allows the attacker to escalate their privileges to `realm-admin` for all users within the realm, granting them extensive control over the system. The composite role relationship persists even after the attacker's own permissions are revoked and across system reboots.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:56523
https://access.redhat.com/errata/RHSA-2026:56524
https://access.redhat.com/security/cve/CVE-2026-9796	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2482464	Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:-:*:*:*

History

No history.

Information

Published : 2026-05-28 05:16

Updated : 2026-09-15 12:17

NVD link : CVE-2026-9796

Mitre link : CVE-2026-9796

CVE.ORG link : CVE-2026-9796

JSON object : View

Products Affected

redhat

build_of_keycloak

CWE

CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

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