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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.

PUBLISHED Reserved 2026-04-07 | Published 2026-04-07 | Updated 2026-04-07 | Assigner wikimedia-foundation




MEDIUM: 5.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Problem types

CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')

Product status

Default status
unaffected

Any version before 3.8.7
affected

Credits

SomeRandomDeveloper finder

Yaron Koren remediation developer

References

phabricator.wikimedia.org/T416368

gerrit.wikimedia.org/...mediawiki/extensions/Cargo/+/1237966

cve.org (CVE-2026-39840)

nvd.nist.gov (CVE-2026-39840)

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