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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.

PUBLISHED Reserved 2026-03-23 | Published 2026-03-23 | Updated 2026-03-25 | Assigner redhat




MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Problem types

Improper Access Control

Product status

Default status
affected

Default status
unaffected

Default status
unaffected

Default status
unaffected

Timeline

2026-03-23:Reported to Red Hat.
2026-03-23:Made public.

Credits

Red Hat would like to thank Evan Hendra for reporting this issue.

References

access.redhat.com/security/cve/CVE-2026-4628 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2450240 (RHBZ#2450240) issue-tracking

cve.org (CVE-2026-4628)

nvd.nist.gov (CVE-2026-4628)

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