CVE-2026-90916: CWE-284 Improper Access Control in Joomla! Project Joomla! CMS
Joomla! Core - [20260906] - Core - Improper ACL checks in content history comparison view in Joomla 4.0.0-5.4.8, 6.0.0-6.1.3 - An improper access check allows unauthorized users to view inaccessible contents.
AI Analysis
Technical Summary
This vulnerability in Joomla! CMS arises from improper access control checks in the content history comparison view. Specifically, in affected versions 4.0.0-5.4.8 and 6.0.0-6.1.3, users with high privileges can bypass intended access restrictions to view content that should be inaccessible. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges required, no user interaction, and low impact on confidentiality.
Potential Impact
Unauthorized users with high privileges can view content history comparison views that should be restricted, potentially exposing sensitive content. The impact is limited to information disclosure with low confidentiality impact as per the CVSS vector. There are no indications of integrity or availability impacts.
Mitigation Recommendations
Patch status is not yet confirmed — check the Joomla! Project vendor advisory for current remediation guidance. No official fix or patch links are provided in the current data. Until a patch is available, restrict access to affected Joomla! CMS versions and monitor for updates from the vendor.
CVE-2026-90916: CWE-284 Improper Access Control in Joomla! Project Joomla! CMS
Description
Joomla! Core - [20260906] - Core - Improper ACL checks in content history comparison view in Joomla 4.0.0-5.4.8, 6.0.0-6.1.3 - An improper access check allows unauthorized users to view inaccessible contents.
CVSS v4.0
Score 5.1medium
Affected software
Joomla! Project
Joomla! CMS
pkg:composer/joomla/joomla-cmsRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Joomla! CMS arises from improper access control checks in the content history comparison view. Specifically, in affected versions 4.0.0-5.4.8 and 6.0.0-6.1.3, users with high privileges can bypass intended access restrictions to view content that should be inaccessible. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges required, no user interaction, and low impact on confidentiality.
Potential Impact
Unauthorized users with high privileges can view content history comparison views that should be restricted, potentially exposing sensitive content. The impact is limited to information disclosure with low confidentiality impact as per the CVSS vector. There are no indications of integrity or availability impacts.
Mitigation Recommendations
Patch status is not yet confirmed — check the Joomla! Project vendor advisory for current remediation guidance. No official fix or patch links are provided in the current data. Until a patch is available, restrict access to affected Joomla! CMS versions and monitor for updates from the vendor.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Joomla
- Date Reserved
- 2026-09-14T11:03:59.813Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6abbeaabe94738e05c4dd18c
Added to database: 09/29/2026, 16:43:23 UTC
Last enriched: 09/29/2026, 16:57:27 UTC
Last updated: 09/29/2026, 18:20:12 UTC
Views: 7
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