Open Redirect in Red Hat Build Of Keycloak 26.2
CVE-2026-3872
A flaw was found in Keycloak. This issue allows an attacker, who controls another path on the same web server, to bypass the allowed path in redirect Uniform Resource Identifiers (URIs) that use a wildcard. A successful attack may lead to…
Vulnerability class: Open Redirect
EPSS: 0.000 (1.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N.
Affected products
- Red Hat Build Of Keycloak 26.2 — versions 26.2.15-1, 26.2-18
- Red Hat Build Of Keycloak 26.2.15
- Red Hat Build Of Keycloak 26.4 — versions 26.4.11-1, 26.4-14
- Red Hat Build Of Keycloak 26.4.11
Weakness classification (CWE)
References
- RHSA-2026:6475 (vendor-advisory, x_refsource_REDHAT)
- RHSA-2026:6476 (vendor-advisory, x_refsource_REDHAT)
- RHSA-2026:6477 (vendor-advisory, x_refsource_REDHAT)
- RHSA-2026:6478 (vendor-advisory, x_refsource_REDHAT)
- access.redhat.com/security/cve/CVE-2026-3872 (vdb-entry, x_refsource_REDHAT)
- RHBZ#2445988 (issue-tracking, x_refsource_REDHAT)
Frequently asked questions
- What is CVE-2026-3872?
- CVE-2026-3872 is a high-severity vulnerability in Red Hat Build Of Keycloak 26.2, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 7.3/10. Published 2026-04-02.
- How severe is CVE-2026-3872?
- High severity. CVSS v3 base score is 7.3 out of 10.