CVE-2026-39840

MEDIUM

CSS injection in multiple Cargo display formats

Title source: cna
STIX 2.1

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.

Scores

CVSS v3 6.1
EPSS 0.0003
EPSS Percentile 9.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (2)
mediawiki/cargo < 3.8.7
Wikimedia Foundation/Mediawiki - Cargo Extension < 3.8.7
Published Apr 07, 2026
Tracked Since Apr 08, 2026