Skip to content
VulniPulse
Sign in
Advisory severityMedium4.3Red Hat Linux

Medium [CVE-2026-4628] Keycloak: org.keycloak.authorization: keycloak: unauthorized resource modification due to improper access control

This medium-severity Red Hat Linux advisory covers CVE-2026-4628 affecting Red Hat Build of Keycloak.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-4628 Source published Source updated

VulniPulse record published

CVE-2026-4628
Affected products & platforms
Red Hat LinuxUnclassified
Open source advisory

Summary

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.

MODERATE: This flaw in Keycloak allows authenticated attackers to bypass the `allowRemoteResourceManagement=false` restriction, enabling unauthorized modification of protected resources. This impacts data integrity in Red Hat Build of Keycloak (RHBK) version rhbk-26.4.

Other Red Hat products, including Enterprise Application Platform and Red Hat Single Sign-On, are not affected as the vulnerable code is not present. Red Hat severity: Moderate — CVSS 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N).

Weakness: CWE-284. Affected Red Hat products: Red Hat Build of Keycloak.

Red Hat lists Red Hat JBoss Enterprise Application Platform 8; Red Hat JBoss Enterprise Application Platform Expansion Pack; Red Hat Single Sign-On 7 as not affected. Red Hat does not currently list a fixing RHSA for this CVE.

Is CVE-2026-4628 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-4628 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-4628?

The advisory VulniPulse tracks names no fixed release. Follow Red Hat's guidance for workarounds and updates.

Confirm against the vendor advisory before you patch.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.

Official advisory · high-confidence parse· fetched 19 days ago·verify at source

Fixed versions

No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.

Official advisory · high-confidence parse· fetched 19 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Official advisory · high-confidence parse· fetched 19 days ago·verify at source

Get an email when Red Hat publishes the next one.

See Red Hat's last 90 days of advisories first. Then choose one product with live alerts free for life, or a free month of real-time alerts on everything with the severity, the fixed version and the vendor's link (card needed, then US$15/month; we email you before the first charge).

Alert me about Red Hat

More Red Hat Linux advisories

All Red Hat Linux advisories

iPhone and Android apps · New on the App Store

Monitor future Red Hat Linux CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.

Download on the App StoreGet CVE alerts on AndroidSee app features

Discussion(0)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.

Sign in to join the discussion.