Bug 2546719

Summary: CVE-2026-78847 fbthrift: gray-matter: arbitrary code execution via eval in front matter parsing [epel-all]
Product: [Fedora] Fedora EPEL Reporter: aedmond
Component: fbthriftAssignee: Michel Lind <michel>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: epel10CC: michel
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["71a20a37-4b56-46d3-87cd-b4b26a2bb513"]}
Fixed In Version: Doc Type: ---
Doc Text:
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Documentation: --- CRM:
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2537934    

Description aedmond 2026-10-06 17:49:40 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.