Is CVE-2026-4628 actively exploited?

No active exploitation of CVE-2026-4628 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-4628 be exploited remotely?

Yes. CVE-2026-4628 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-4628?

CVE-2026-4628 has a CVSS score of 4.3 (MEDIUM).

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MEDIUM

CVE-2026-4628

CWE-284Published: March 23, 2026· Updated: Mar 23, 2026

4.3

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:7.1th

Official 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.

NVD Source

Technical Analysis

CVE-2026-4628 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.