CVE-2026-9800

Keycloak-policy-enforcer: keycloak policy enforcer: authorization bypass via incorrect uri comparison

HIGH
8.1
CVSS Score
Published: June 25, 2026 at 04:16 PM UTC
Updated: October 20, 2026 at 05:16 AM UTC
4 products affected across 1 vendorBuild of KeycloakBuild of QuarkusSingle Sign on

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Severity
HIGH8.1
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

26.4 ≤ v < 26.4.1326.6 ≤ v ≤ 26.6.4
Vendor states this is fixed in 26.4-19 (unaffected)
Vendor states this is fixed in 26.4-22 (unaffected)
Vendor states this is fixed in 26.4.13 (unaffected)
Vendor states this is fixed in 26.4.13-1 (unaffected)
Vendor states this is fixed in 26.4.14 (unaffected)
Vendor states this is fixed in 26.4.14-1 (unaffected)
Vendor states this is fixed in 26.6-8 (unaffected)
Vendor states this is fixed in 26.6.4 (unaffected)
Vendor states this is fixed in 26.6.4-2 (unaffected)
All versions
All versions
Vendor states this is fixed in 7 (unknown)

References (11)

VDB Entryx_refsource_REDHATVendor Advisory
Source: cverecord
https://access.redhat.com/security/cve/CVE-2026-9800
Issue Trackingx_refsource_REDHATVendor Advisory
Source: cverecord
https://bugzilla.redhat.com/show_bug.cgi?id=2482472
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:30083
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:30084
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:30049
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:30050
Vendor Advisory
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9800.json
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:50846

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.1HIGHredhat
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-1025

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