Medium
TemplateSandbox can be abused for XSS by asking another user to preview a page with a certain sandbox prefix
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - TemplateSandbox Extension allows Cross-Site Scripting (XSS). This issue affects Mediawiki - TemplateSandbox Extension: from * before 1.46.1, 1.45.5, 1.43.10.
Announced Group revision 1
Original source ↗CVE-2026-100376
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-100376
Mediawiki - TemplateSandbox Extension
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://gerrit.wikimedia.org/g/mediawiki/extensions/TemplateSandbox/+/refs/heads/master",
"vendor": "Wikimedia Foundation",
"product": "Mediawiki - TemplateSandbox Extension",
"versions": [
{
"status": "affected",
"version": "*",
"lessThan": "1.46.1, 1.45.5, 1.43.10",
"versionType": "semver"
}
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-100376
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #2386 · Revision 1
- Added to Heist Feed
- Publisher date