Keycloak has Improper Access Control that allows attackers with valid credentials to bypass the allowRemoteResourceManagement=false
GHSA-4pgc-gfrr-wcmg · CVE-2026-4628
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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.
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