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VULNERABILITIES

CVE-2026-39840 Details

Description

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Wikimedia Foundation Mediawiki - Cargo Extension allows XSS Targeting Non-Script Elements.This issue affects Mediawiki - Cargo Extension: before 3.8.7.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.1 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Cargo/+/1237966 wikimedia-foundationPatch
https://phabricator.wikimedia.org/T416368 wikimedia-foundationExploitIssue TrackingVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')wikimedia-foundation

Affected Products

ProductVersions
mediawiki cargo
< 3.8.7

CPE

  • cpe:2.3:a:mediawiki:cargo:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

5 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-39840
NVD Published Date:
Apr 7, 2026
NVD Last Modified:
Jul 24, 2026
Source:
wikimedia-foundation
CVE-2026-39840 Details - Not Deferred