CVE-2026-39839

MEDIUM

Stored XSS through URLs in Cargo's map format

Title source: cna
STIX 2.1

Description

Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in Wikimedia Foundation Mediawiki - Cargo Extension allows Stored XSS.This issue affects Mediawiki - Cargo Extension: before 3.8.7.

References (3)

Scores

CVSS v3 6.1
EPSS 0.0003
EPSS Percentile 7.9%
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-80
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