MAL-2026-6392 Malicious code in cccmyssr3 (npm)
Malicious package
Published
MAL-2026-6392 is a malicious package: cccmyssr3 (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-2026-6392/ (Markdown: https://insights.sbomify.com/MAL-2026-6392/index.md)
- Package
- cccmyssr3
- Registry
- npm
What is MAL-2026-6392?
MAL-2026-6392 is a malicious package in cccmyssr3, published on 24 Jun 2026.
Official description
On
npm install, this package automatically runs postinstall.js, which executes curl -X POST with a body containing the installer's hostname ($(hostname)), current user ($(whoami)), and the first 10 environment variables base64-encoded ($(env | head -10 | base64 -w 0)), sending them over plain HTTP to http://r1x55270.requestrepo.com — a requestrepo.com subdomain used as an attacker data-collection endpoint. Environment variables on developer and CI machines routinely contain credentials, API tokens, and CI secrets, so this is a credential-theft payload. The package's main is a trivial one-line formatDate stub and its description is 'A harmless utility package' — a cover story unrelated to the lifecycle behavior.What should I do about MAL-2026-6392?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.