Vulnerability in Red Hat Build Of Keycloak
CVE-2026-9800
A flaw was found in Keycloak Policy Enforcer. This vulnerability allows any authenticated user to bypass all authorization policies, including role, scope, and User-Managed Access (UMA) permission checks. By including the configured access-denied page path within a request URL, either as a path segment or a query parameter, an attacker can gain unauthorized access to protected resources.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.007 (49.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.000
Affected products
- Red Hat Build Of Keycloak
- Red Hat Build Of Keycloak 26.4 — versions 26.4-22, 26.4.14-1, 26.4.13-1
- Red Hat Build Of Keycloak 26.4.13
- Red Hat Build Of Keycloak 26.4.14
- Red Hat Build Of Keycloak 26.6 — versions 26.6-8, 26.6.4-2
- Red Hat Build Of Keycloak 26.6.4
- Red Hat Build Of Quarkus
- Red Hat Jboss Enterprise Application Platform Expansion Pack
- Red Hat Satellite 6
- Red Hat Single Sign-On 7
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-9800 (vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Vendor Advisory)
- access.redhat.com/errata/RHSA-2026:30083 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2026:30084 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2026:30049 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2026:30050 (vendor-advisory, Vendor Advisory)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Vendor Advisory)
- access.redhat.com/errata/RHSA-2026:50846 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:50847 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:36002 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-9800?
- CVE-2026-9800 is a high-severity vulnerability in Red Hat Build Of Keycloak, classified under CWE-1025. CVSS score: 8.1/10. Published 2026-06-25.
- How severe is CVE-2026-9800?
- High severity. CVSS v3 base score is 8.1 out of 10.