CVE-2026-58036: CWE-200 Exposure of Sensitive Information to an Unauthorized Actor in Wikimedia Foundation MediaWiki
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Api/ApiQueryAllUsers.Php, includes/Api/ApiQueryUsers.Php, includes/Permissions/PermissionManager.Php, includes/User/UserGroupManager.Php.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-58036) in MediaWiki allows unauthorized actors to access sensitive information due to improper handling in specific API and permission management files (includes/Api/ApiQueryAllUsers.Php, includes/Api/ApiQueryUsers.Php, includes/Permissions/PermissionManager.Php, includes/User/UserGroupManager.Php). The CVSS 4.0 vector indicates network attack vector with high attack complexity and low privileges required, but overall low impact. The vulnerability is classified under CWE-200 (Exposure of Sensitive Information). No vendor advisory or patch is currently available, and no exploits are known.
Potential Impact
The vulnerability could allow unauthorized users to gain access to sensitive information managed by MediaWiki's user and permission APIs. However, the low CVSS score and absence of known exploits suggest limited practical impact at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or mitigation is currently published, monitor for updates from the Wikimedia Foundation and apply patches once available. No specific workaround or temporary fix is provided.
CVE-2026-58036: CWE-200 Exposure of Sensitive Information to an Unauthorized Actor in Wikimedia Foundation MediaWiki
Description
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Api/ApiQueryAllUsers.Php, includes/Api/ApiQueryUsers.Php, includes/Permissions/PermissionManager.Php, includes/User/UserGroupManager.Php.
CVSS v4.0
Score 2.1low
Affected software
pkg:github/wikimedia/mediawikiRun 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 (CVE-2026-58036) in MediaWiki allows unauthorized actors to access sensitive information due to improper handling in specific API and permission management files (includes/Api/ApiQueryAllUsers.Php, includes/Api/ApiQueryUsers.Php, includes/Permissions/PermissionManager.Php, includes/User/UserGroupManager.Php). The CVSS 4.0 vector indicates network attack vector with high attack complexity and low privileges required, but overall low impact. The vulnerability is classified under CWE-200 (Exposure of Sensitive Information). No vendor advisory or patch is currently available, and no exploits are known.
Potential Impact
The vulnerability could allow unauthorized users to gain access to sensitive information managed by MediaWiki's user and permission APIs. However, the low CVSS score and absence of known exploits suggest limited practical impact at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or mitigation is currently published, monitor for updates from the Wikimedia Foundation and apply patches once available. No specific workaround or temporary fix is provided.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- wikimedia-foundation
- Date Reserved
- 2026-06-27T13:32:41.613Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a45341727e9c79719b99914
Added to database: 07/01/2026, 15:36:55 UTC
Last enriched: 07/10/2026, 09:48:24 UTC
Last updated: 08/14/2026, 00:41:13 UTC
Views: 86
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