CVE-2026-78847
Critical
Description
An issue in gray-matter All versions (verified on 4.0.3) allows the JavaScript engine in lib/engines.js using eval() to parse front matter when language is js/javascript.This allows arbitrary code execution.
SeverityCritical
CVSS9.8
Exploit probability—
ProductGray-matter
PublishedSep 21, 2026
First seenSep 21, 2026
Weakness typeCWE-95CWE-95
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gray-matter | No range specified | — |
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