mw-test-utils (npm) · Malicious Code
Affects mw-test-utilsSource GCVE Database
Malicious package : remove mw-test-utils and rotate any secrets on hosts that installed it.
Data as of 29 Oct 2026, 18:22 UTC
Malicious package
Published to npm · OSV MAL-2026-18371
What to do
Remove mw-test-utils 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 |
|---|---|---|
| npmmw-test-utils | Affected
| Fixed in– |
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Description
The npm package mw-test-utils (versions 1.0.0, 10.0.0, and 10.0.1) contains malicious preinstall and postinstall scripts that send the installing user's environment username, hostname, and working directory via unencrypted HTTP requests to a hardcoded IP address. The package contains no functional code and is labeled as a dependency-confusion proof of concept, but the scripts execute automatically on every install, potentially leaking sensitive environment information.