Authorization Policy Bypass in Keycloak Policy Enforcer by Red Hat
CVE-2026-9800

8.1HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Build Of Keycloak
Vendor
CVE Published:
25 June 2026

What is CVE-2026-9800?

A flaw in Keycloak's Policy Enforcer enables authenticated users to bypass crucial authorization policies, circumventing controls such as role, scope, and User-Managed Access (UMA) permissions. This vulnerability is exploited by appending the designated access-denied page path within a request URL, either as a segment or a query parameter. Consequently, this allows attackers to gain unauthorized access to sensitive resources, highlighting a significant risk for applications utilizing Keycloak for authentication and authorization.

References

https://access.redhat.com/security/cve/CVE-2026-9800
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2482472
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Bas Levering for reporting this issue.
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