CVE-2026-4628

MEDIUM4.3EPSS 0.01%

Keycloak has Improper Access Control that allows attackers with valid credentials to bypass the allowRemoteResourceManagement=false

Published: 3/23/2026Modified: 4/13/2026

Also known as:GHSA-4pgc-gfrr-wcmgCGA-p27v-v5h9-q8x5

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.

Affected packages (1)

Maven/org.keycloak:keycloak-servicesfrom 0, <= 26.6.0

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	MEDIUM4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

References (4)

ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-4628
WEBhttps://access.redhat.com/security/cve/CVE-2026-4628
WEBhttps://bugzilla.redhat.com/show_bug.cgi?id=2450240
WEBhttps://github.com/keycloak/keycloak