CVE-2026-100240

critical · 9.1

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.

9.1

CVSS

0.1%

EPSS (exploit prob.)

3rd

EPSS percentile

2026-09-29

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weaknesses

CWE-862

References

https://gerrit.wikimedia.org/r/q/Iaf9f6e2280798af5516197257ddc0264b9ad9fb7
https://phabricator.wikimedia.org/T407974

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-100240