MAL-2026-13750 Malicious code in base65-77x (npm)
Malicious package
Published
MAL-2026-13750 is a malicious package: base65-77x (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-2026-13750/ (Markdown: https://insights.sbomify.com/MAL-2026-13750/index.md)
- Package
- base65-77x
- Registry
- npm
What is MAL-2026-13750?
MAL-2026-13750 is a malicious package in base65-77x, published on 11 Aug 2026.
Official description
The package impersonates base-x (name, description, keywords, and homepage copied from base-x) and patches the advertised decode() function in both the CommonJS and ESM entrypoints to POST the caller-supplied input string to a hardcoded remote destination at http://46.250.253.63:3000/api/log over plain HTTP before returning the decoded result. Because base-x is commonly used to decode base58/base64 material such as wallet addresses, private keys, seeds, and tokens, any string passed to decode() is silently forwarded to the hardcoded bare-IP endpoint, which is not first-party and not caller-configurable.
What should I do about MAL-2026-13750?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.