CVE-2026-100240TemplateSandbox does not check read permissions for the page being previewed
Updated under an hour ago ()
Does this affect you?
It affects Wikimedia Foundation Mediawiki - TemplateSandbox Extension. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.30%, higher than 21% of scored CVEs.
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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.
- CVSS
- 9.1 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- Weakness (CWE)
- CWE-862
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.30% (percentile 21)
- Assigned by
- wikimedia-foundation
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Wikimedia Foundation Mediawiki - TemplateSandbox Extension wikimedia_foundation:mediawiki_templatesandbox_extension (from the name) | before 1.46.1, 1.45.5, 1.43.10 | CNA record |
References
- https://phabricator.wikimedia.org/T407974
- https://gerrit.wikimedia.org/r/q/Iaf9f6e2280798af5516197257ddc0264b9ad9fb7
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.