MAL-2026-12326 Malicious code in @offa/offa-uwk (npm)
Malicious package
Published
MAL-2026-12326 is a malicious package: @offa/offa-uwk (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-2026-12326/ (Markdown: https://insights.sbomify.com/MAL-2026-12326/index.md)
- Package
- @offa/offa-uwk
- Registry
- npm
What is MAL-2026-12326?
MAL-2026-12326 is a malicious package in @offa/offa-uwk, published on 5 Aug 2026.
Official description
package.json declares a postinstall hook that runs index.js. On install, index.js collects os.hostname(), os.userInfo().username, process.cwd(), and the entire process.env object, then POSTs the JSON payload via https.request to the hardcoded endpoint https://e6b10849-38dc-4280-a8e3-72ab39cfaf65.webhook.site/collect. Dumping the whole process environment on install ships every environment variable on the installer's machine — commonly containing AWS/GCP/GitHub/npm and other tokens — to an anonymous attacker-controlled webhook. A preinstall hook additionally writes a marker file to the hardcoded absolute path /home/OFFA/flag.
What should I do about MAL-2026-12326?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.