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Findings

CVE-2026-71574

[20260803] - Core - Inconsistent ACL checks for mutating webservice endpoints

Published Aug 17, 2026 · Joomla Joomla

Project: Joomla! SubProject: CMS Impact: High Severity: Moderate Probability: Low Versions: 4.0.0-5.4.7, 6.0.0-6.1.2 Exploit type: Incorrect Access Control Reported Date: 2026-07-15 Fixed Date: 2026-08-18 CVE Number: CVE-2026-71574 Description An improper access check allows unauthorized users to perform mutation actions in webservice endpoints, where the same mutation was restricted in the backend UI. Affected Installs Joomla! CMS versions 4.0.0-5.4.7, 6.0.0-6.1.2 Solution Upgrade to version 5.4.8, 6.1.3 Contact The JSST at the Joomla! Security Centre . Reported By: Paul, Sorrachat, tms, Morr

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. Aug 17, 2026 · Joomla Security

    Detected

    Project: Joomla! SubProject: CMS Impact: High Severity: Moderate Probability: Low Versions: 4.0.0-5.4.7, 6.0.0-6.1.2 Exploit type: Incorrect Access Control Reported Date: 2026-07-15 Fixed Date: 2026-08-18 CVE Number: CVE-2026-71574 Description An improper access check allows unauthorized users to perform mutation actions in webservice endpoints, where the same mutation was restricted in the backen

Sources

  • Joomla SecurityVendor advisoryCVE-2026-71574

    Project: Joomla! SubProject: CMS Impact: High Severity: Moderate Probability: Low Versions: 4.0.0-5.4.7, 6.0.0-6.1.2 Exploit type: Incorrect Access Control Reported Date: 2026-07-15 Fixed Date: 2026-08-18 CVE Number: CVE-2026-71574 Description An improper access check allows unau

    developer.joomla.org