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OpenAdvisories
Medium · 4.8 CVE-2026-100376 EUVD-2026-87359GHSA-8fch-w6q6-2249

TemplateSandbox can be abused for XSS by asking another user to preview a page with a certain sandbox prefix

Published Sep 25, 2026 · Updated Sep 26, 2026 · Assigned by wikimedia-foundation

Vendor: Wikimedia Foundation Product: Mediawiki - TemplateSandbox Extension Category: Web / CMS

Description

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.

Affected products

VendorProductAffectedFixed
Wikimedia Foundation Mediawiki - TemplateSandbox Extension < 1.46.1, 1.45.5, 1.43.10 1.46.1, 1.45.5, 1.43.10

Advisories 1

References