CVE-2026-4628 — MEDIUM (4.3)

Vulnerability 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 Score

4.3

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Redhat	Build Of Keycloak	-

Related Weaknesses (CWE)

CWE-284

References

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

FAQ

What is CVE-2026-4628?

CVE-2026-4628 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 allowRemoteRe...

How severe is CVE-2026-4628?

CVE-2026-4628 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-4628?

Check the references section above for vendor advisories and patch information. Affected products include: Redhat Build Of Keycloak.