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CVE-2026-34091 Details
Description
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This issue affects MediaWiki: from * before 1.43.7, 1.44.4, 1.45.2.
A vulnerability allowing the exposure of sensitive information to unauthorized actors exists in Wikimedia Foundation MediaWiki versions prior to 1.43.7, 1.44.4, and 1.45.2.
Metrics
CVSS 4.0 Severity and Vector Strings:
CNA: wikimedia-foundationCVSS-B:6.9 MEDIUMVector:CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 11, 2026Exploitation: NoneAutomatable: YesTechnical Impact: Partial
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://phabricator.wikimedia.org/T411305 | wikimedia-foundation | Issue TrackingVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
| CWE-200 | Exposure of Sensitive Information to an Unauthorized Actor | wikimedia-foundation |
Affected Products
| Product | Versions |
|---|---|
| mediawiki mediawiki | < 1.43.7 >= 1.44.0, < 1.44.4 >= 1.45.0, < 1.45.2 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | wikimedia-foundation |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 14, 2026 | Initial Analysis | [email protected] |
| May 11, 2026 | New CVE Received | wikimedia-foundation |