Bug 2546721 - CVE-2026-78847 h3: gray-matter: arbitrary code execution via eval in front matter parsing [fedora-all]
Summary: CVE-2026-78847 h3: gray-matter: arbitrary code execution via eval in front ma...
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: h3
Version: rawhide
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Felix Wang
QA Contact:
URL:
Whiteboard: {"flaws": ["71a20a37-4b56-46d3-87cd-b...
Depends On:
Blocks: CVE-2026-78847
TreeView+ depends on / blocked
 
Reported: 2026-10-06 17:50 UTC by aedmond
Modified: 2026-10-06 17:50 UTC (History)
1 user (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:

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Description aedmond 2026-10-06 17:50:25 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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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