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Findings

CVE-2026-90917

[20260907] - Core - Improper ACL checks in outputs for tagged items

Published Sep 25, 2026 · Joomla Joomla

Project: Joomla! SubProject: CMS Impact: Low Severity: Moderate Probability: Moderate Versions: 4.0.0-5.4.8,6.0.0-6.1.3 Exploit type: Incorrect Access Control Reported Date: 2026-07-28 Fixed Date: 2026-09-25 CVE Number: CVE-2026-90917 Description An improper access check allows unauthorized users to view content items from inaccessible categories. Affected Installs Joomla! CMS versions 4.0.0-5.4.8, 6.0.0-6.1.3 Solution Upgrade to version 5.4.9, 6.1.4 Contact The JSST at the Joomla! Security Centre . Reported By: Amin İsayev

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 25, 2026 · Joomla Security

    Detected

    Project: Joomla! SubProject: CMS Impact: Low Severity: Moderate Probability: Moderate Versions: 4.0.0-5.4.8,6.0.0-6.1.3 Exploit type: Incorrect Access Control Reported Date: 2026-07-28 Fixed Date: 2026-09-25 CVE Number: CVE-2026-90917 Description An improper access check allows unauthorized users to view content items from inaccessible categories. Affected Installs Joomla! CMS versions 4.0.0-5.4.8

Sources

  • CVE.orgVulnerability recordCVE-2026-90917

    Official CVE identifier

    cve.org
  • Joomla SecurityVendor advisoryCVE-2026-90917

    Project: Joomla! SubProject: CMS Impact: Low Severity: Moderate Probability: Moderate Versions: 4.0.0-5.4.8,6.0.0-6.1.3 Exploit type: Incorrect Access Control Reported Date: 2026-07-28 Fixed Date: 2026-09-25 CVE Number: CVE-2026-90917 Description An improper access check allows u

    developer.joomla.org