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Malicious code in express-mongo-santi (npm)

0
Unknown
Published: 08/05/2026 (08/05/2026, 12:22:09 UTC)
Source: GCVE Database
Product: express-mongo-santi

Description

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (85c97cf70eead9dda2069dc9da7e4a780f7c69953714ad050566c0e94a343e33) The package's main file index.js is a heavily obfuscated bundle (obfuscator.io-style rotated string array with base64+RC4 decoders) whose only purpose is a remote-fetch-and-execute pipeline that fires when the module is require()'d. On load it pulls in os, fs, path, crypto, child_process, and https, assembles a hardcoded IPv4 destination from four numeric octets concatenated at runtime, issues an HTTPS GET to that host, splits the response on ':' into an IV and ciphertext, derives an AES key with crypto.scryptSync, decrypts the body with createDecipheriv, writes the plaintext to a file under os.homedir(), and spawns it via child_process with cwd set to the home directory. Module, method, and destination strings are all reconstructed at runtime through the decoders, and an uncaughtException handler suppresses errors. The package name is also a typosquat of express-mongo-sanitize. Installing or importing this package results in arbitrary attacker-controlled code executing on the installer's machine under the installer's user identity.

Affected software

npmghsa
express-mongo-santi
Affected versions
=1.1.9

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

Technical Details

Gcve Source
db.gcve.eu
Osv Id
MAL-2026-12377
Osv Schema Version
1.7.4
Aliases
[]
Ecosystems
["npm"]
Database Specific Severity
null
Cvss Version
null

Threat ID: 6a735750bf8831d53915a663

Added to database: 08/05/2026, 15:31:28 UTC

Last updated: 08/05/2026, 15:31:28 UTC

Views: 1

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