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Back to active CVEs
Medium · CVSS 4.3CVE-2026-4628GHSA-4PGC-GFRR-WCMG

Keycloak: org.keycloak.authorization: keycloak: unauthorized resource modification due to improper access controlCVE-2026-4628

Answer in brief

CVE-2026-4628 records a Medium severity (CVSS 4.3) vulnerability in Keycloak: org.keycloak.authorization: keycloak: unauthorized resource modification due to improper access control. The current sources do not mark it as known exploited. The current feed maps Red Hat/keycloak-services (generic), org.keycloak:keycloak-services (maven), org.keycloak:keycloak-services (maven). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Mar 23, 2026Updated Oct 22, 2026Source checked Oct 22, 2026First seen by HOL Sep 10, 2026Material review Oct 22, 2026
Upstream Advisory

Record context

Vulnerability class
Secret Exfiltration
EPSS
Not reported
CWE IDs
CWE-284
Source
CVE List V5
Source checked
Oct 22, 2026
References
6 linked sources
Open source record

Key facts

Risk
Medium · CVSS 4.3
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 4.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/keycloak-services (generic), org.keycloak:keycloak-services (maven), org.keycloak:keycloak-services (maven). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/keycloak-servicesgeneric*Not reported
org.keycloak:keycloak-servicesmaven>=0Not reported
org.keycloak:keycloak-servicesmaven<=26.6.0Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/keycloak-services, org.keycloak:keycloak-services, org.keycloak:keycloak-services.
  2. 2Review the reported fix. Source-reported workaround: 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.

Evidence timeline and material changes

  1. Published upstream

    Mar 23, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 22, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 10, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
  • GitHub security advisorygithub.com
  • NVD vulnerability recordnvd.nist.gov
  • GitHub security advisorygithub.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.