MAL-2026-15915 Malicious code in text-transform-plus (npm)
Malicious package
Published
MAL-2026-15915 is a malicious package: text-transform-plus (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-2026-15915/ (Markdown: https://insights.sbomify.com/MAL-2026-15915/index.md)
- Package
- text-transform-plus
- Registry
- npm
What is MAL-2026-15915?
MAL-2026-15915 is a malicious package in text-transform-plus, published on 4 Sep 2026.
Official description
The package's postinstall script downloads a ZIP archive from a hardcoded Dropbox URL (https://www.dropbox.com/scl/fi/djz38wdi1wks9j1h57zuv/coeur.zip) to a hidden randomized temp path, extracts it using unzip/Expand-Archive, and executes any.exe found on Windows with detached, hidden-window flags. The install script short-circuits when NODE_ENV=production or CI is set, and stages the payload under os.tmpdir() with dot-prefixed random names (
.${Date.now()}.tmp, .data${Math.random()...}) to evade sandbox/CI environments and casual discovery. The declared purpose (a text-transform utility) has no need for any binary download or execution. The fetched binary is unpinned, unverified, and delivered from an anonymous file-sharing host, yielding arbitrary code execution on developer Windows machines at npm install time.What should I do about MAL-2026-15915?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.