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VULNERABILITIES

CVE-2026-9796 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://access.redhat.com/errata/RHSA-2026:56523 [email protected]
https://access.redhat.com/errata/RHSA-2026:56524 [email protected]
https://access.redhat.com/security/cve/CVE-2026-9796 [email protected]Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2482464 [email protected]Issue TrackingVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition[email protected]

Affected Products

ProductVersions
redhat build of keycloak
All versions

CPE

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

Remediation

  • No remediation found in references.

Change History

8 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-9796
NVD Published Date:
May 28, 2026
NVD Last Modified:
Sep 15, 2026
Source:
[email protected]
CVE-2026-9796 Details - Not Deferred