MAL-2026-14154 Malicious code in typesript-cli (npm)
Malicious package
Published
MAL-2026-14154 is a malicious package: typesript-cli (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-2026-14154/ (Markdown: https://insights.sbomify.com/MAL-2026-14154/index.md)
- Package
- typesript-cli
- Registry
- npm
What is MAL-2026-14154?
MAL-2026-14154 is a malicious package in typesript-cli, published on 18 Aug 2026.
Official description
Package name is a one-character typosquat of the widely-used 'typescript' family. On npm install, scripts/postinstall.js XOR-decodes (key 'stf2026') a GitHub-hosted URL held as an integer array and downloads a Windows PE to TEMP\main.exe, then spawns it detached with no hash or signature verification. When running under WSL or virtualized Linux (detected via /proc/version and WSLENV), the script decodes a bridge launcher command and inline script from further XOR-obfuscated blobs and executes them via child_process.exec with windowsHide:true to fetch and run the same payload on the Windows host, crossing the Linux sandbox boundary. The script also POSTs platform info to a hardcoded bare-IP endpoint http://193.70.34.101:20099/vote, with the IP split across a string array ['193','70','34','101'].join('.') to hide it from static review, serving as an install beacon.
What should I do about MAL-2026-14154?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.