CVE-2026-39838

Improper neutralization of input during web page generation (‘cross-site scripting’) vulnerability in Wikimedia Foundation MediaWiki – ProofreadPage Extension allows XSS Targeting Non-Script Elements.
The issue has been remediated on the `master` branch, and in the release branches for MediaWiki versions 1.43, 1.44, and 1.45.

More information : https://gerrit.wikimedia.org/r/q/Idd51e18479b32b7176b43ff74ca1c49d6bdd0628