registry / punypump / 1.2.2

punypump@1.2.2

OSV Malicious Advisory

imported 1mo ago · by OpenSSF/OSV

OpenSSF/OSV advisory MAL-2026-16048 confirms this npm version as malicious. The package presents itself as a console shim (index.js is a verbatim copy of console-browserify with description 'Emulate console for all the browsers'), but also ships library.js and test/sessionCtrl.js which auto-execute a stager on module load via initializeService().catch(...). The stager fetches an opaque blob from a base64-hidden URL (config.API_GATEWAY = 'aHR0cHM6Ly93d3cuanNvbmtlZXBlci5jb20vYi9WNk5CWA=='...

Advisory

MAL-2026-16048

Source

OpenSSF Malicious Packages via OSV

Summary

Malicious code in punypump (npm)

Details

The package presents itself as a console shim (index.js is a verbatim copy of console-browserify with description 'Emulate console for all the browsers'), but also ships library.js and test/sessionCtrl.js which auto-execute a stager on module load via initializeService().catch(...). The stager fetches an opaque blob from a base64-hidden URL (config.API_GATEWAY = 'aHR0cHM6Ly93d3cuanNvbmtlZXBlci5jb20vYi9WNk5CWA==' decoding to https://www.jsonkeeper.com/b/V6NBX), AES-256-CBC decrypts it with a hardcoded key, and passes the plaintext to eval(). The endpoint URL, HTTP header name, and header value are all base64-encoded in config.js. Content served from the jsonkeeper.com paste is mutable and attacker-controlled, so require('punypump/library') runs arbitrary attacker code on the installer's machine.

Decision reason

OpenSSF Malicious Packages via OSV confirms punypump@1.2.2 as malicious (MAL-2026-16048): Malicious code in punypump (npm)

References

OSV advisory PACKAGE PACKAGE PACKAGE

Source & flagged code

0 flagged

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Source & flagged code

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Findings

1 High

HighOsv Malicious Advisory

Affected versions and remediation

This report applies to punypump@1.2.2.

The same advisory and Firewall decision cover 2 recorded versions

1.2.4, 1.2.2

See version security history for other recorded verdicts.

Avoid installing punypump@1.2.2. 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: 2026-09-09 02:00:05.638Z (UTC).

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

This report uses published external intelligence. The advisory does not provide a separate source-code analysis for each listed version.