registry / punypump / 1.2.5

punypump@1.2.5

OSV Malicious Advisory

imported 1mo ago · by OpenSSF/OSV

OpenSSF/OSV advisory MAL-2026-16048 confirms this npm version as malicious. punypump ships a console-browserify-lookalike shim (index.js) that additionally requires library.js, which auto-executes initializeService() at module load. library.js fetches an encrypted blob from a base64-obfuscated URL that decodes to https://www.jsonkeeper.com/b/V6NBX (a public JSON-paste service used as a mutable payload host), AES-256-CBC decrypts the response with a hardcoded key/salt, and passes the...

Advisory

MAL-2026-16048

Source

OpenSSF Malicious Packages via OSV

Summary

Malicious code in punypump (npm)

Details

punypump ships a console-browserify-lookalike shim (index.js) that additionally requires library.js, which auto-executes initializeService() at module load. library.js fetches an encrypted blob from a base64-obfuscated URL that decodes to https://www.jsonkeeper.com/b/V6NBX (a public JSON-paste service used as a mutable payload host), AES-256-CBC decrypts the response with a hardcoded key/salt, and passes the plaintext to eval(). The endpoint URL and associated headers are stored in config.js as base64 strings decoded at runtime. Any process that requires punypump executes whatever code the paste currently serves. README and badges are copied from console-browserify, while the package is named punypump and contains an added remote-code loader that console-browserify does not.

Decision reason

No blocking static signals were detected.

References

OSV advisory PACKAGE PACKAGE

Decision evidence

public snapshot

Behavioral surface

Source

CryptoEnvironmentVarsEvalFilesystemNetwork

Supply chain

HighEntropyStrings

Manifest

NoLicense

scanned 3 file(s), 5.28 KB of source

Source & flagged code

1 flagged

library.jsView file

70// Execute session initialization L71: const sessionContext = eval(this.sessionData); L72: return sessionContext;

Low

Eval

Package source references a known benign dynamic code generation pattern.

library.jsView on unpkg · L70

Source & flagged code

1 flagged · loading source

library.jsView file

70// Execute session initialization L71: const sessionContext = eval(this.sessionData); L72: return sessionContext;

Low

Eval

Package source references a known benign dynamic code generation pattern.

library.jsView on unpkg · L70

Findings

2 Medium5 Low

MediumNetwork

MediumEnvironment Vars

LowScripts Present

LowEvallibrary.js

LowFilesystem

LowHigh Entropy Strings

LowNo License

Affected versions and remediation

This report applies to punypump@1.2.5.

See version security history for other recorded verdicts.

Avoid installing punypump@1.2.5. Remove it from direct dependencies and check your lockfile for transitive copies.
Choose an independently verified alternative or release. This report does not establish that other versions are safe.
If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.

Evidence last updated: 2026-09-08 19:30:06.723Z (UTC).

Source advisory published: 2026-09-08 19:05:28.000Z (UTC).