MalwarePublished 8 Apr 2026Updated 13 Nov 2026

black-moon-js (npm) · Malicious Code

Affects black-moon-jsSource GCVE Database

Malicious package : remove black-moon-js and rotate any secrets on hosts that installed it.

Data as of 13 Nov 2026, 04:41 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-2870

What to do

Remove black-moon-js from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.

Affected software

Product	Affected	Fixed in
npmblack-moon-js	Affected =1.0.0	Fixed in–

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Description

The npm package 'black-moon-js' version 1.0.0 contains malicious code that communicates with a domain linked to malicious activity. Installation or execution of this package can lead to full compromise of the affected computer. Immediate removal of the package and rotation of all secrets and keys from a different, secure machine is strongly advised.

Impact

Any computer with 'black-moon-js' version 1.0.0 installed or running is considered fully compromised. Attackers may have gained full control, risking exposure of all stored secrets and keys. This can lead to unauthorized access, data theft, and further system compromise.

Defensive guidance

Remove the 'black-moon-js' package version 1.0.0 immediately from all affected systems. Rotate all secrets and keys stored on compromised machines from a separate, secure computer. Due to the potential for full system compromise, consider rebuilding affected systems to ensure complete removal of malicious software.

Summary

The 'black-moon-js' package at version 1.0.0, identified by OpenSSF Package Analysis and Amazon Inspector, contains malicious code that communicates with a known malicious domain. This behavior indicates that the package is designed to compromise systems where it is installed. The compromise is severe enough that any machine with this package should be considered fully compromised, necessitating secret rotation and package removal. However, removal alone may not eliminate all malicious artifacts due to potential full system compromise.

References

github.com/advisories/GHSA-86hq-c3m7-846h (opens in a new tab)

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What to do

Affected software

Description

AI analysisMachine-generated, updated 13 Nov 2026, 04:41 UTC

Technical details

References

Community reviews