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CVE-2026-9799

Keycloak: keycloak: unauthorized access to resources via uma permission ticket bypass

Published: Jun 25, 2026Updated: Jul 1, 2026 Sources: CVE List NVDCWE-639
4.6MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 93.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

A flaw was found in org.keycloak.authorization. An authenticated user with a granted User-Managed Access (UMA) permission ticket for one resource can exploit this by using a specific permission request prefix to bypass per-resource access control. This allows the user to gain unauthorized access to all resources of that type within the same resource server, even if they do not have a ticket for those specific resources. This vulnerability requires the resource server to be configured in PERMISSIVE policy enforcement mode and affects typed resources with ownerManagedAccess enabled, where no explicit policy protects the resource type. The primary consequence is unauthorized information disclosure or modification of resources.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:RS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-639

Affected Products

Red Hat
commercial·USaka redhat
Red Hat build of Keycloak 26.4On-premWeb App
Web & CMS Plugins
Red Hat build of Keycloak 26.4.13On-prem
DevTools & CI
Red Hat build of Keycloak 26.6On-prem
Security Products / identity-access-mgmt
Red Hat build of Keycloak 26.6.4On-prem
DevTools & CI
build of keycloakOn-prem
Operating Systems / linux-distro

Exploitability

Official Patch Available
Workaround Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Initial Access
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References

https://access.redhat.com/errata/RHSA-2026:30049
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:30050
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:30083
access.redhat.com
and 3 more references View all →

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