CVE-2026-78847 gray-matter - Remote Code Execution

gray-matter All versions contains a remote code execution caused by use of eval() in lib/engines.js to parse front matter with language set to js/javascript, letting attackers execute arbitrary code remotely, exploit requires crafted front matter input.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.60% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Remote Code Execution
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
21 September 2026
Updated
15 October 2026
Weakness
CWE-95

Vendor fix

Update to the latest version of gray-matter.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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