MAL-2026-12093 Malicious code in @wethenorth12/ethers-signer (npm)
Malicious package
Published
MAL-2026-12093 is a malicious package: @wethenorth12/ethers-signer (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-2026-12093/ (Markdown: https://insights.sbomify.com/MAL-2026-12093/index.md)
- Package
- @wethenorth12/ethers-signer
- Registry
- npm
What is MAL-2026-12093?
MAL-2026-12093 is a malicious package in @wethenorth12/ethers-signer, published on 5 Aug 2026.
Official description
On require(), index.js collects the host's hostname, username, home directory, platform, current working directory, and the entire process.env, base64-encodes the payload, and transmits it via https.get to api.telegram.org using a hardcoded bot token and chat_id 8969499041. A marker file in the OS temp directory is used to gate repeated sends. process.env routinely carries CI tokens, cloud credentials, and API keys on developer and build-system machines, so this constitutes bulk credential theft on install/import. The package self-describes as a drop-in replacement for @ethersproject/abstract-signer and delegates to it when present, using impersonation of a widely-used Ethereum library as the lure to increase installations.
What should I do about MAL-2026-12093?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.