PT-2026-31012 · Unknown+1 · Cargo Extension+1

Somerandomdeveloper + 1 · Published 2026-04-07 · Updated 2026-04-08 · CVE-2026-39840

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Mediawiki - Cargo Extension versions prior to 3.8.7

Description A cross-site scripting (XSS) issue exists in the Mediawiki - Cargo Extension. This allows for XSS attacks targeting non-script elements due to improper input neutralization during web page generation.

Recommendations Update Mediawiki - Cargo Extension to version 3.8.7 or later.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-39840

Affected Products

Cargo Extension

Mediawiki

References · 4

• https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Cargo/+/1237966 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-39840 · Security Note
• https://phabricator.wikimedia.org/T416368 · Vendor Advisory
• https://twitter.com/CVEnew/status/2041711902968181155 · Twitter Post