What is CVE-2026-0976?

CVE-2026-0976 is a low-severity vulnerability in Red Hat Build Of Keycloak, classified under Improper Input Validation. CVSS score: 3.7/10. Published 2026-01-15.

How severe is CVE-2026-0976?

Low severity. CVSS v3 base score is 3.7 out of 10.

Improper input validation in Red Hat Build Of Keycloak

CVE-2026-0976

A flaw was found in Keycloak. This improper input validation vulnerability occurs because Keycloak accepts RFC-compliant matrix parameters in URL path segments, while common reverse proxy configurations may ignore or mishandle them. A remo…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.004 (27.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)

Frequently asked questions

What is CVE-2026-0976?: CVE-2026-0976 is a low-severity vulnerability in Red Hat Build Of Keycloak, classified under Improper Input Validation. CVSS score: 3.7/10. Published 2026-01-15.
How severe is CVE-2026-0976?: Low severity. CVSS v3 base score is 3.7 out of 10.