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CVE-2026-4628

Keycloak: org.keycloak.authorization: keycloak: unauthorized resource modification due to improper access control

Published: Mar 23, 2026Updated: Apr 1, 2026 Sources: CVE List NVDCWE-284
NVD MITRE
4.3CVSSMEDIUM
EPSS Score
0.2%
Top 89.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A flaw was found in Keycloak. An improper Access Control vulnerability in Keycloak’s User-Managed Access (UMA) resource_set endpoint allows attackers with valid credentials to bypass the allowRemoteResourceManagement=false restriction. This occurs due to incomplete enforcement of access control checks on PUT operations to the resource_set endpoint. This issue enables unauthorized modification of protected resources, impacting data integrity.

CVSS Vector Breakdown

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

CWE-284

Affected Products

Red Hat Build of KeycloakRed HatWeb & CMS Plugins
Red Hat JBoss Enterprise Application Platform 8Red Hat
On-premWeb App
Enterprise Software / itsm-monitoring
Red Hat JBoss Enterprise Application Platform Expansion PackRed Hat
On-premOS
Operating Systems / linux-distro
Red Hat Single Sign-On 7Red Hat
On-premSecurity Product
Security Products / identity-access-mgmt
build of keycloakredhat
On-prem
Security Products / identity-access-mgmt
red hatcommercialUSOperating Systemsaka red hat
redhatcommercialUSOperating Systemsaka red hat

Exploitability

Official Patch Available
Workaround Available

References

https://access.redhat.com/security/cve/CVE-2026-4628
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2450240
bugzilla.redhat.com

Timeline

Published
Mar 23, 2026
Last Updated
Apr 1, 2026

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