Vulnerability in The Wikimedia Foundation Mediawiki - Cargo extension

[ Description ]Official description

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Mediawiki - Cargo extension allows Reflected XSS. This issue affects Mediawiki - Cargo extension: through 3.9.4.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund27 Sep 2026WID-SEC-2026-3597

  MediaWiki Extensions: Multiple vulnerabilities Translated from German

  CVE-2026-57440CVE-2026-96875CVE-2026-100237+11 more CVEs

[ References ]References

• gerrit.wikimedia.org/r/c/mediawiki/extensions/Cargo/+/1328627
• phabricator.wikimedia.org/T434784