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CVE-2026-100376

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

CVSS 4.0 4.8 MEDIUMCheck source for fixed versionsKEV status unknown
Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-100376

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-100376

Published

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.

Source published
25 Sep 2026 20:48:53 UTC
Source modified
26 Sep 2026 22:51:18 UTC
Saved here
23 Oct 2026 15:48:27 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 4.0 · 4.8 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L

ChangeIntel

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Sources read 12 Nov 17:32 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current

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