Missing Authorization vulnerability in Wikimedia Foundation Mediawiki - TemplateSandbox Extension allows Accessing Functionality Not Properly… (CVE-2026-100240)
A missing authorization vulnerability exists in the Wikimedia Foundation Mediawiki TemplateSandbox Extension, allowing access to functionality that is not properly constrained by access control lists (ACLs). This affects versions before 1.46.1, 1.45.5, and 1.43.10. No CVSS score or vendor patch information is provided.
AI Analysis
Technical Summary
The vulnerability identified as CVE-2026-100240 is a missing authorization issue in the TemplateSandbox Extension of Wikimedia Foundation's Mediawiki software. It allows unauthorized users to access functionality that should be restricted by ACLs. The affected versions include all versions prior to 1.46.1, 1.45.5, and 1.43.10. There is no information on available patches or vendor advisories in the provided data.
Potential Impact
Unauthorized users may gain access to functionality within the TemplateSandbox Extension that should be protected by access controls, potentially leading to unauthorized actions or information disclosure within Mediawiki environments using affected versions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the TemplateSandbox Extension functionality and monitor for unusual activity related to this component.
Missing Authorization vulnerability in Wikimedia Foundation Mediawiki - TemplateSandbox Extension allows Accessing Functionality Not Properly… (CVE-2026-100240)
Description
A missing authorization vulnerability exists in the Wikimedia Foundation Mediawiki TemplateSandbox Extension, allowing access to functionality that is not properly constrained by access control lists (ACLs). This affects versions before 1.46.1, 1.45.5, and 1.43.10. No CVSS score or vendor patch information is provided.
Affected software
pkg:github/wikimedia/mediawiki-templatesandbox-extensionRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2026-100240 is a missing authorization issue in the TemplateSandbox Extension of Wikimedia Foundation's Mediawiki software. It allows unauthorized users to access functionality that should be restricted by ACLs. The affected versions include all versions prior to 1.46.1, 1.45.5, and 1.43.10. There is no information on available patches or vendor advisories in the provided data.
Potential Impact
Unauthorized users may gain access to functionality within the TemplateSandbox Extension that should be protected by access controls, potentially leading to unauthorized actions or information disclosure within Mediawiki environments using affected versions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the TemplateSandbox Extension functionality and monitor for unusual activity related to this component.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-3835-4xp5-hjqc
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-100240"]
- State
- PUBLISHED
Threat ID: 6abc27c2680226ef6846f816
Added to database: 09/29/2026, 21:04:02 UTC
Last enriched: 09/29/2026, 21:18:03 UTC
Last updated: 09/30/2026, 03:38:52 UTC
Views: 5
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