MAL-2026-14208 Malicious code in eth-batcher (npm)
Malicious package
Published
MAL-2026-14208 is a malicious package: eth-batcher (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-2026-14208/ (Markdown: https://insights.sbomify.com/MAL-2026-14208/index.md)
- Package
- eth-batcher
- Registry
- npm
What is MAL-2026-14208?
MAL-2026-14208 is a malicious package in eth-batcher, published on 19 Aug 2026.
Official description
index.js is a verbatim copy of an unrelated Mongoose LeanHooks Plugin with a ~149 KB obfuscated Function(…) payload concatenated onto the module.exports line. On require(), the payload constructs and executes code decoded from a hex byte table via an XOR/rotation decoder. The advertised purpose in package.json (Ethereum JSON-RPC batching) does not match the shipped code, which contains no Ethereum or Web3 logic — the mismatched benign source acts as a cover for the appended dropper. Any process that imports this package executes the decoded payload at load time.
What should I do about MAL-2026-14208?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.