CVE-2026-100240
Critical
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.
SeverityCritical
CVSS9.1
Exploit probability—
ProductMediawiki - TemplateSandbox Extension
PublishedSep 29, 2026
First seenSep 29, 2026
Weakness typeCWE-862Missing authorization
How to fix
Update
- Wikimedia Foundation Mediawiki - TemplateSandbox Extension1.46.1, 1.45.5, 1.43.10 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Wikimedia Foundation Mediawiki - TemplateSandbox Extension | v < 1.46.1, 1.45.5, 1.43.10 | 1.46.1, 1.45.5, 1.43.10 |
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