CVE-2026-90917: CWE-284 Improper Access Control in Joomla! Project Joomla! CMS
Joomla! Core - [20260907] - Core - Improper ACL checks in outputs for tagged items in Joomla 4.0.0-5.4.8, 6.0.0-6.1.3 - An improper access check allows unauthorized users to view content items from inaccessible categories.
AI Analysis
Technical Summary
This vulnerability in Joomla! CMS involves improper access control (CWE-284) where the system fails to correctly enforce ACL checks on outputs for tagged content items. As a result, unauthorized users can access content items from categories they should not have permission to view. The affected versions are 4.0.0 through 5.4.8 and 6.0.0 through 6.1.3. No known exploits are reported in the wild, and no patch or remediation information is provided in the input data.
Potential Impact
Unauthorized users can view content items from categories that are intended to be inaccessible, potentially exposing sensitive or restricted information. The impact is limited to information disclosure without requiring authentication or user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor Joomla! Project advisories for updates. Until a fix is available, consider restricting access to sensitive content by other means or disabling tagged item outputs if feasible.
CVE-2026-90917: CWE-284 Improper Access Control in Joomla! Project Joomla! CMS
Description
Joomla! Core - [20260907] - Core - Improper ACL checks in outputs for tagged items in Joomla 4.0.0-5.4.8, 6.0.0-6.1.3 - An improper access check allows unauthorized users to view content items from inaccessible categories.
CVSS v4.0
Score 6.9medium
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 involves improper access control (CWE-284) where the system fails to correctly enforce ACL checks on outputs for tagged content items. As a result, unauthorized users can access content items from categories they should not have permission to view. The affected versions are 4.0.0 through 5.4.8 and 6.0.0 through 6.1.3. No known exploits are reported in the wild, and no patch or remediation information is provided in the input data.
Potential Impact
Unauthorized users can view content items from categories that are intended to be inaccessible, potentially exposing sensitive or restricted information. The impact is limited to information disclosure without requiring authentication or user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor Joomla! Project advisories for updates. Until a fix is available, consider restricting access to sensitive content by other means or disabling tagged item outputs if feasible.
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: 6abbeaabe94738e05c4dd18d
Added to database: 09/29/2026, 16:43:23 UTC
Last enriched: 09/29/2026, 16:57:24 UTC
Last updated: 09/29/2026, 18:01:04 UTC
Views: 8
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