MalwarePublished 28 Oct 2026Updated 29 Oct 2026

spectral-net-probe (npm) · Malicious Code

Affects spectral-net-probeSource GCVE Database

Malicious package : remove spectral-net-probe and rotate any secrets on hosts that installed it.

Data as of 29 Oct 2026, 18:10 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-18368

What to do

Remove spectral-net-probe 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
npmspectral-net-probe	Affected =1.0.1 =1.0.4 =1.0.10	Fixed in–

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Description

The npm package spectral-net-probe contains malicious code in versions 1.0.1, 1.0.4, and 1.0.10. These versions execute code during installation or loading that contacts remote servers to exfiltrate local files specified by the attacker. This behavior constitutes a supply-chain attack leveraging npm package distribution to steal arbitrary files from users' systems.

Impact

This is a supply-chain malware attack enabling arbitrary local file exfiltration from systems that install or load the affected spectral-net-probe package versions. Attackers can remotely specify which files to read and steal partial contents, potentially exposing sensitive information. The malicious behavior occurs automatically during installation or module loading without user consent.

Defensive guidance

Users should immediately avoid installing or using spectral-net-probe versions 1.0.1, 1.0.4, and 1.0.10. Remove these package versions from any systems and audit for potential data exfiltration. Monitor npm accounts and packages for suspicious activity and rely on trusted sources for package installation.

Summary

spectral-net-probe versions 1.0.1 and 1.0.4 include a postinstall script that runs node index.js, which sends HTTPS GET requests to Cloudflare quick tunnel URLs. Version 1.0.10 executes code on package load that fetches a list of local file paths from a hardcoded IP endpoint, reads up to ten specified files from the local filesystem, and uploads the first 400 characters of each file to the attacker's servers. The exfiltration is disguised as a 'local module config sync helper' using a fake YAML manifest. The malicious package was published by the npm account kristol07, which also published other suspicious packages.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 29 Oct 2026, 18:10 UTC

Technical details

References

Community reviews