CVE-2026-100383Stored i18n XSS in WikiLambda's VisualEditor integration
Updated under an hour ago ()
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It affects Wikimedia Foundation Mediawiki - WikiLambda Extension. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - WikiLambda Extension allows Cross-Site Scripting (XSS). This issue affects Mediawiki - WikiLambda Extension: 1.47.0-alpha. The issue has been remediated on the `master` branch.
- CVSS
- 4.8 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- wikimedia-foundation
- NVD analysis
- Awaiting Analysis
- Record last updated
- Sep 26, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Wikimedia Foundation Mediawiki - WikiLambda Extension wikimedia_foundation:mediawiki_wikilambda_extension (from the name) | 1.47.0-alpha | CNA record |
References
- https://phabricator.wikimedia.org/T434967
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/WikiLambda/+/1326391
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.