CVE-2026-9800 | A flaw was found in Keycloak Policy Enforcer. This vulnerabi… | CVSS 8.1 HIGH

Description

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.

Metadata

CVE ID: CVE-2026-9800
State: PUBLISHED
Assigner: redhat
Reserved: 2026-05-28 04:00 UTC
Published: 2026-06-25 16:16 UTC
Last updated: 2026-06-25 17:29 UTC
Primary CWE: CWE-1025
Comparison Using Wrong Factors
Vendor / Product: Red Hat / Red Hat Build of Keycloak
Sources: cve.org · NVD

Severity & Metrics

8.1 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Red Hat	Red Hat Build of Keycloak	—	—

Weakness (CWE)

CWE	Source	Description
CWE-1025	cna	Comparison Using Wrong Factors

CVSS scores (1)

Score	Severity	Version	Source	Vector
8.1	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References (2)