Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://gerrit.wikimedia.org/r/q/Idd51e18479b32b7176b43ff74ca1c49d6bdd0628
- https://phabricator.wikimedia.org/T406088
FAQ
What is CVE-2026-39838?
CVE-2026-39838 is a documented vulnerability. Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Wikimedia Foundation MediaWiki - ProofreadPage Extension allows XSS Targeting Non-Script Elements....
How severe is CVE-2026-39838?
CVSS scoring is not yet available for CVE-2026-39838. Check NVD for updates.
Is there a patch for CVE-2026-39838?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.