Vulnerability in Red Hat Build Of Keycloak
CVE-2026-37979
A flaw was found in Keycloak. This access control vulnerability in Keycloak's OpenID Connect (OIDC) token introspection endpoint allows a confidential client to bypass audience restrictions. An attacker-controlled client with valid credent…
EPSS: 0.000 (1.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Red Hat Build Of Keycloak
- Red Hat Build Of Keycloak 26.4 — versions 26.4.12-1, 26.4-17
- Redhat Build_of_keycloak
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-37979?
- CVE-2026-37979 is a medium-severity vulnerability in Red Hat Build Of Keycloak, classified under Improper Access Control. CVSS score: 6.5/10. Published 2026-05-19.
- How severe is CVE-2026-37979?
- Medium severity. CVSS v3 base score is 6.5 out of 10.