CVE-2026-39840 MEDIUM

CVE-2026-39840: CSS injection in multiple Cargo display formats

Vendor Wikimedia Foundation
Product Mediawiki - Cargo Extension
Weakness CWE-79 · XSS
Published April 7, 2026
Last update April 7, 2026
View on NVD All CVEs

CVSS base score

5.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction —
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 7, 2026 CVE published
April 7, 2026 Record updated