CVE-2026-34095 Details
Description
Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Actions/ActionEntryPoint.Php, includes/Request/FauxResponse.Php. This issue affects MediaWiki: from * before 1.43.7, 1.44.4, 1.45.2.
A vulnerability exists in Wikimedia Foundation MediaWiki versions prior to 1.43.7, 1.44.4, and 1.45.2. The issue arises in the ActionEntryPoint component, where the 'action=raw' request for a 'Special:Mypage' subpage is incorrectly served with a 'Content-Type' of 'text/html' instead of the requested 'text/javascript'. This misconfiguration can be exploited to execute arbitrary JavaScript in the context of the user's session.
Users can update to MediaWiki versions 1.43.7, 1.44.4, or 1.45.2, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 11, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://phabricator.wikimedia.org/T419192 | wikimedia-foundation | Issue TrackingVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-668 | Exposure of Resource to Wrong Sphere | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| mediawiki mediawiki | < 1.43.7 >= 1.44.0, < 1.44.4 >= 1.45.0, < 1.45.2 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | wikimedia-foundation |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 13, 2026 | Initial Analysis | [email protected] |
| May 11, 2026 | CVE Modified | CISA-ADP |
| May 11, 2026 | New CVE Received | wikimedia-foundation |