MalwarePublished 16 Apr 2026Updated 1 Sep 2026

nemo-jaws (npm) · Malicious Code

Affects nemo-jawsSource GCVE Database

What to do

Affected software

Product	Affected	Fixed in
npmnemo-jaws`pkg:npm/nemo-jaws`Other threats	Affected =3.99.99 =99.99.9 =28.0.0 =25.0.0	Fixed in–

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Description

The npm package 'nemo-jaws' contains malicious code that executes during installation. Its preinstall script collects various host system identifiers and sends them to an external attacker-controlled server. Systems with this package installed should be considered fully compromised, and all secrets and keys on those systems should be rotated immediately. Removal of the package does not guarantee complete remediation due to potential persistent compromise.

Impact

Any system that installs or runs the affected versions of the 'nemo-jaws' package is considered fully compromised. Sensitive information such as system identifiers is exfiltrated to an attacker-controlled endpoint. The compromise may allow attackers to gain persistent control, making all stored secrets and keys on the affected system potentially exposed and requiring immediate rotation from a secure environment.

Defensive guidance

Immediate removal of the 'nemo-jaws' package is recommended. However, due to the likelihood of full system compromise, all secrets and keys stored on the affected system should be rotated from a different, trusted machine. Comprehensive incident response and forensic analysis should be conducted to identify and remediate any persistent malicious presence. Patch status is not applicable as this is a malicious package rather than a vulnerability with an official fix.

Summary

The 'nemo-jaws' npm package, specifically versions 3.99.99, 99.99.9, 28.0.0, and 25.0.0, contains a malicious preinstall hook that executes 'index.js'. This script gathers host information including hostname, platform, architecture, home directory, and DNS servers, then transmits this data via HTTP POST to a hardcoded Burp Collaborator subdomain controlled by an external party. This behavior indicates a supply chain compromise with potential full system compromise upon installation.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 8 Sep 2026, 11:23 UTC

Technical details

References

Community reviews