What is CVE-2026-9791?

CVE-2026-9791 is a medium-severity vulnerability in Red Hat Build Of Keycloak, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-05-28.

How severe is CVE-2026-9791?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Red Hat Build Of Keycloak

CVE-2026-9791

A flaw was found in Keycloak. An authenticated user with existing organization membership can exploit this flaw by accessing user-facing APIs, such as the account API or by requesting an OpenID Connect (OIDC) token with the 'organization'…

Vulnerability class: Broken Access Control

EPSS: 0.000 (7.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

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

Frequently asked questions

What is CVE-2026-9791?: CVE-2026-9791 is a medium-severity vulnerability in Red Hat Build Of Keycloak, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-05-28.
How severe is CVE-2026-9791?: Medium severity. CVSS v3 base score is 4.3 out of 10.