What is CVE-2026-3429?

CVE-2026-3429 is a medium-severity vulnerability in Red Hat Build Of Keycloak, classified under Improper Access Control. CVSS score: 4.2/10. Published 2026-03-11.

How severe is CVE-2026-3429?

Medium severity. CVSS v3 base score is 4.2 out of 10.

Vulnerability in Red Hat Build Of Keycloak

CVE-2026-3429

A flaw was identified in the Account REST API of Keycloak that allows a user authenticated at a lower security level to perform sensitive actions intended only for higher-assurance sessions. Specifically, an attacker who has already obtain…

EPSS: 0.000 (4.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

RHSA-2026:6477 (vendor-advisory, x_refsource_REDHAT)
RHSA-2026:6478 (vendor-advisory, x_refsource_REDHAT)
access.redhat.com/security/cve/CVE-2026-3429 (vdb-entry, x_refsource_REDHAT)
RHBZ#2443771 (issue-tracking, x_refsource_REDHAT)

Frequently asked questions

What is CVE-2026-3429?: CVE-2026-3429 is a medium-severity vulnerability in Red Hat Build Of Keycloak, classified under Improper Access Control. CVSS score: 4.2/10. Published 2026-03-11.
How severe is CVE-2026-3429?: Medium severity. CVSS v3 base score is 4.2 out of 10.