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Malicious code in modsync (npm)

0
Unknown
Published: 08/19/2026 (08/19/2026, 05:04:38 UTC)
Source: GCVE Database
Product: modsync

Description

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (04b786780800de5689c4ae50377166b26050fd688ec5d75cfb14fda990b92494) The package presents itself as a pino-like logger/middleware (README, docs/, and index.d.ts copied from pinojs/pino; keywords `fast/logger/stream/json`) but its exported middleware is a no-op. index.js unconditionally requires `./lib/config`, which is a 4 MB single-line file bearing obfuscator.io fingerprints (hex-named identifiers, a ~23,909-entry rotating string array, decoder functions, control-flow flattening, hex string escapes) and executes a top-level IIFE at module load. Consumers that `require('modsync')` execute this obfuscated blob in their process. Package metadata is inconsistent with the advertised purpose (name `modsync` combined with pino keywords, description referencing vulnerability management, author `Robert King <[email protected]>`, bugs URL `jsonspack.com/issues`). The combination of a plagiarized cover-story shell around a large obfuscated require-time payload is characteristic of a malicious package rather than legitimate business logic; the obfuscation exists to hide behavior from inspection.

Affected software

npmghsa
modsync
Affected versions
=5.0.2

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
MAL-2026-14257
Osv Schema Version
1.7.4
Aliases
[]
Ecosystems
["npm"]
Database Specific Severity
null
Cvss Version
null

Threat ID: 6a85b4c0acd9273b4925240e

Added to database: 08/19/2026, 13:50:56 UTC

Last updated: 08/19/2026, 13:51:33 UTC

Views: 1

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