MAL-2026-10042 Malicious code in chai-as-disarmed (npm)
Malicious package
Published
MAL-2026-10042 is a malicious package: chai-as-disarmed (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-2026-10042/ (Markdown: https://insights.sbomify.com/MAL-2026-10042/index.md)
- Package
- chai-as-disarmed
- Registry
- npm
What is MAL-2026-10042?
MAL-2026-10042 is a malicious package in chai-as-disarmed, published on 9 Jul 2026.
Official description
Package name typosquats
chai-as-promised while the README and keywords impersonate pino to bait installs. On require(), index.js detach-spawns lib/caller.js, which decodes a base64-stored URL to https://api.jsonstorage.net/v1/json/2ef8c758-.../a179ea35-..., issues an authenticated GET (header name and value are also base64-hidden inside a local object that shadows process.env), and executes the returned .cookie string via new Function.constructor('require', s)(require) — granting the remote operator arbitrary code execution in the installer's Node.js process with full require access. The fetch retries up to 5 times. The remote content sits in a mutable third-party JSON store, so the executed payload can be swapped at any time without republishing the package. None of this behavior corresponds to the advertised chai/pino functionality.What should I do about MAL-2026-10042?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.