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.
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Fixes

Solution

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Workaround

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History

Wed, 23 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 22 Sep 2026 20:45:00 +0000

Type Values Removed Values Added
Title Arbitrary code execution via eval() in front matter parsing

Tue, 22 Sep 2026 19:45:00 +0000

Type Values Removed Values Added
Title gray-matter JavaScript Front Matter Evaluates User Input, Enabling Arbitrary Code Execution
Weaknesses CWE-94

Tue, 22 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-95
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


Mon, 21 Sep 2026 22:45:00 +0000

Type Values Removed Values Added
Title gray-matter JavaScript Front Matter Evaluates User Input, Enabling Arbitrary Code Execution
Weaknesses CWE-94

Mon, 21 Sep 2026 21:45:00 +0000

Type Values Removed Values Added
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.
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-09-22T15:12:53.387Z

Reserved: 2026-08-25T00:00:00.000Z

Link: CVE-2026-78847

cve-icon Vulnrichment

Updated: 2026-09-22T15:09:43.862Z

cve-icon NVD

Status : Deferred

Published: 2026-09-21T22:16:58.863

Modified: 2026-09-22T20:00:03.713

Link: CVE-2026-78847

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-22T20:30:08Z

Weaknesses