MalwarePublished 30 Jun 2026Updated 2 Aug 2026

@sudoughnym/enviro-demo (npm) · Malicious Code

Affects @sudoughnym/enviro-demoSource GCVE Database

Malicious package : remove @sudoughnym/enviro-demo and rotate any secrets on hosts that installed it.

Data as of 26 Oct 2026, 15:55 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-6697

What to do

Remove @sudoughnym/enviro-demo 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
npm@sudoughnym/enviro-demo	Affected =99.99.99 =0.3.3	Fixed in–

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Description

The npm package @sudoughnym/enviro-demo version 99.99.99 contains malicious preinstall and postinstall scripts that automatically run during npm install. These scripts collect host identifiers and environment metadata, including hostname, current working directory, process ID, Node.js version, platform, user environment variables, and send this data to an attacker-controlled third-party webhook. The package is a dependency-confusion proof-of-concept designed to outrank internal packages by using an inflated version number. Installing this package leaks sensitive environment information to an unauthorized external endpoint.

Impact

Any build or developer machine that installs @sudoughnym/enviro-demo@99.99.99 will leak host identity and environment metadata, including potentially sensitive environment variable names, to an attacker-controlled external endpoint. This exposure can lead to information disclosure that may facilitate further attacks or compromise of secrets. The malicious code executes automatically during installation without user interaction.

Defensive guidance

Until an official fix or removal is confirmed, avoid installing or resolving to @sudoughnym/enviro-demo@99.99.99. Review and restrict package sources to trusted registries to prevent dependency confusion attacks. Remove any instances of this package from build and developer environments and audit environment variables for sensitive information exposure.

Summary

@sudoughnym/enviro-demo@99.99.99 includes lifecycle scripts (preinstall.js and postinstall.js) that execute automatically on installation. These scripts gather detailed environment and host information such as os.hostname(), process.cwd(), pid, node version, platform, process.env.USER, the first ten environment variable names, and the total count of environment variables. This collected data is POSTed as JSON to a third-party webhook URL not affiliated with the package publisher. The package's high version number is intended to cause internal build systems to resolve to this malicious public package instead of a private internal package named 'enviro'. This results in leakage of host identity and environment variable structure, potentially exposing secret variable names to attackers on every install.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 13 Jul 2026, 10:40 UTC

Technical details

References

Community reviews