What is CVE-2026-9796?

CVE-2026-9796 is a medium-severity vulnerability in Red Hat Build Of Keycloak, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 6.5/10. Published 2026-05-28.

How severe is CVE-2026-9796?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Red Hat Build Of Keycloak

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 p…

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

EPSS: 0.000 (8.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.

Affected products

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry, Vendor Advisory)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2026-9796?: CVE-2026-9796 is a medium-severity vulnerability in Red Hat Build Of Keycloak, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 6.5/10. Published 2026-05-28.
How severe is CVE-2026-9796?: Medium severity. CVSS v3 base score is 6.5 out of 10.