CVE-2026-103046mediumCWE-79

CVE-2026-103046: medium-severity vulnerability in The Wikimedia Foundation Mediawiki…

WikifunctionsFragmentRenderer does unsafe string replacements on user-provided HTML

Published · Updated

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.1epss 0.2%
exploitation probability
0.2%top 96% of all CVEs
observed exploitation
nono source reports it
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Wikimedia Foundation MediaWiki - WikiLambda extension allows Stored XSS. This issue affects MediaWiki - WikiLambda extension: before 1.46.1.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Affected products
The Wikimedia Foundation · Mediawiki - WikiLambda Extension
Related CVEs — The Wikimedia Foundation Mediawiki…

In the same product, most dangerous first.

CVE-2025-62695MEDIUMStored XSS through system messagesEPSS 0.3%CVE-2026-58517MEDIUMBlocked users can create and edit WikiLambda objectsEPSS 0.3%CVE-2026-96872LOWWikiLambda public function execution bypasses the unsaved-code permission through nested Z825 compositionsEPSS 0.2%
References
https://gerrit.wikimedia.org/r/c/1307827https://phabricator.wikimedia.org/T428829