CVE-2026-100240— TemplateSandbox does not check read permissions for the page being previewed
Quick assessment
Affected
Wikimedia Foundation Mediawiki - TemplateSandbox Extension
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Missing Authorization vulnerability in Wikimedia Foundation Mediawiki - TemplateSandbox Extension allows Accessing Functionality Not Properly Constrained by ACLs. This issue affects Mediawiki - TemplateSandbox Extension: from * before 1.46.1, 1.45.5, 1.43.10.
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I. Basic Information for CVE-2026-100240
Vulnerability Information
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Vulnerability Title
TemplateSandbox does not check read permissions for the page being previewed
Source: CVE Program / CVE List V5
Vulnerability Description
Missing Authorization vulnerability in Wikimedia Foundation Mediawiki - TemplateSandbox Extension allows Accessing Functionality Not Properly Constrained by ACLs.
This issue affects Mediawiki - TemplateSandbox Extension: from * before 1.46.1, 1.45.5, 1.43.10.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Wikimedia Foundation | Mediawiki - TemplateSandbox Extension | * ~ 1.46.1, 1.45.5, 1.43.10 | - |
|
II. Public POCs for CVE-2026-100240
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-100240 (2)
Same Patch Batch · Wikimedia Foundation · 2026-09-29 · 8 CVEs total
| CVE-2026-100238 | Flow colon-separator and flow-guidedtour-optin-welcome-description messages allow stored X | |
| CVE-2026-100241 | Private change tags exposed to anonymous users via revision-tags-change events | |
| CVE-2026-102796 | Unauthenticated SQL injection in UserPageViewTracker via filterusers and ignoreusers param | |
| CVE-2026-100244 | CentralAuth exposes locally suppressed block information via globaluserinfo API and Specia | |
| CVE-2026-100245 | Stored XSS on Wikibase Special:SetSiteLink via unescaped system message | |
| CVE-2026-100242 | DataTransfer depends on phpspreadsheet version vulnerable to CVE-2026-59933 (XLS/OLE memor | |
| CVE-2026-100243 | Stored XSS in WikiSEO author and image properties on action=info |
IV. Related Vulnerabilities
Same vendor: Wikimedia Foundation
-
CVE-2026-102796
Unauthenticated SQL injection in UserPageViewTracker via fil -
CVE-2026-100245
Stored XSS on Wikibase Special:SetSiteLink via unescaped sys -
CVE-2026-100244
CentralAuth exposes locally suppressed block information via -
CVE-2026-100243
Stored XSS in WikiSEO author and image properties on action= -
CVE-2026-100242
DataTransfer depends on phpspreadsheet version vulnerable to
V. Comments for CVE-2026-100240
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