What is CVE-2026-9798?

CVE-2026-9798 is a medium-severity vulnerability in Red Hat Build Of Keycloak, classified under Authentication Bypass by Primary Weakness. CVSS score: 4.3/10. Published 2026-05-28.

How severe is CVE-2026-9798?

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

Vulnerability in Red Hat Build Of Keycloak

CVE-2026-9798

A flaw was found in Keycloak, an open-source identity and access management solution. When a user account is temporarily locked due to repeated failed login attempts, an attacker with valid client credentials can exploit the Client-Initiat…

EPSS: 0.001 (16.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

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

Affected products

Weakness classification (CWE)

CWE-305 — Authentication Bypass by Primary Weakness

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-2026-9798?: CVE-2026-9798 is a medium-severity vulnerability in Red Hat Build Of Keycloak, classified under Authentication Bypass by Primary Weakness. CVSS score: 4.3/10. Published 2026-05-28.
How severe is CVE-2026-9798?: Medium severity. CVSS v3 base score is 4.3 out of 10.