MAL-2026-10183 Malicious code in fkext-browser-min (npm)
Malicious package
Published
MAL-2026-10183 is a malicious package: fkext-browser-min (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-2026-10183/ (Markdown: https://insights.sbomify.com/MAL-2026-10183/index.md)
- Package
- fkext-browser-min
- Registry
- npm
What is MAL-2026-10183?
MAL-2026-10183 is a malicious package in fkext-browser-min, published on 10 Jul 2026.
Official description
The package runs vishu.js as a preinstall lifecycle hook on
npm install. That script fetches the machine's public IP from api.ipify.org, collects os.hostname() and GitHub Actions / CI environment variables (GITHUB_*), and transmits them as query parameters to a hardcoded webhook.site collector URL over HTTPS. It additionally performs a DNS lookup of a subdomain of the form ping-<hostname>.<collaborator>.oastify.com, providing an out-of-band exfiltration channel (Burp Collaborator style) that bypasses HTTP egress filters. There is no legitimate functionality shipped alongside this — the package's only install-time effect is host reconnaissance and beacon-out to attacker-controlled sinks. This is a dependency-confusion / bug-bounty-style beacon against installer/CI environments.What should I do about MAL-2026-10183?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.
Sources
Also known as GHSA-rc5q-c5vp-6g46.