What is CVE-2026-9801?

CVE-2026-9801 is a medium-severity vulnerability in Red Hat Build Of Keycloak, classified under Improper Validation of Specified Quantity in Input. CVSS score: 4.9/10. Published 2026-05-28.

How severe is CVE-2026-9801?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Vulnerability in Red Hat Build Of Keycloak

CVE-2026-9801

A flaw was found in Keycloak. A remote attacker with high privileges, such as a realm administrator configuring a malicious Lightweight Directory Access Protocol (LDAP) server or an attacker compromising an upstream LDAP server, could expl…

EPSS: 0.002 (48.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

CWE-1284 — Improper Validation of Specified Quantity in Input

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-2026-9801?: CVE-2026-9801 is a medium-severity vulnerability in Red Hat Build Of Keycloak, classified under Improper Validation of Specified Quantity in Input. CVSS score: 4.9/10. Published 2026-05-28.
How severe is CVE-2026-9801?: Medium severity. CVSS v3 base score is 4.9 out of 10.