MAL-2026-4535 Malicious code in configcat-trello-powerup (npm)
Malicious package
Published
MAL-2026-4535 is a malicious package: configcat-trello-powerup (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-2026-4535/ (Markdown: https://insights.sbomify.com/MAL-2026-4535/index.md)
- Package
- configcat-trello-powerup
- Registry
- npm
What is MAL-2026-4535?
MAL-2026-4535 is a malicious package in configcat-trello-powerup, published on 21 May 2026.
Official description
package.json declares
"preinstall": "node index.js", which fires automatically on npm install. index.js collects host identifiers (os.hostname, os.userInfo, homedir, DNS servers) and reads sensitive system files (/etc/passwd, /etc/hosts) plus package metadata, then HTTPS POSTs the bundle to a hardcoded Burp Collaborator subdomain hzklpyrf8gdhgtycz16veroqihobc10q.oastify.com. The package ships no real functionality — empty description, empty author, and a name resembling a plausible internal Trello/ConfigCat integration — fingerprint of a dependency-confusion squat whose only purpose is to beacon installer-side data to the attacker for follow-on targeting.What should I do about MAL-2026-4535?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.