{"id":"CVE-2026-39838","title":"Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Wikimedia Foundation MediaWiki - ProofreadPage Extension allows XSS Targeting Non-Script Elements.\nThe issue has been remediated on the…","summary":"Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Wikimedia Foundation MediaWiki - ProofreadPage Extension allows XSS Targeting Non-Script Elements.\nThe issue has been remediated on the…","severity":"none","cwe":["CWE-79"],"published":"2026-04-07","updated":"2026-07-21","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-39838","references":[{"url":"https://gerrit.wikimedia.org/r/q/Idd51e18479b32b7176b43ff74ca1c49d6bdd0628","label":"c4f26cc8-17ff-4c99-b5e2-38fc1793eacc"},{"url":"https://phabricator.wikimedia.org/T406088","label":"c4f26cc8-17ff-4c99-b5e2-38fc1793eacc"}],"tags":["nvd"],"epss":0.00402,"epssPercentile":0.34234,"ingestedAt":"2026-07-22T07:59:32.375Z","slug":"CVE-2026-39838","body":"## Overview\n\nImproper neutralization of input during web page generation ('cross-site scripting') vulnerability in Wikimedia Foundation MediaWiki - ProofreadPage Extension allows XSS Targeting Non-Script Elements.\nThe issue has been remediated on the `master` branch, and in the release branches for MediaWiki versions 1.43, 1.44, and 1.45.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}