MAL-2026-5475 Malicious code in ipy-rev-proxy (npm)
Malicious package
Published
MAL-2026-5475 is a malicious package: ipy-rev-proxy (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-2026-5475/ (Markdown: https://insights.sbomify.com/MAL-2026-5475/index.md)
- Package
- ipy-rev-proxy
- Registry
- npm
What is MAL-2026-5475?
MAL-2026-5475 is a malicious package in ipy-rev-proxy, published on 9 Jun 2026.
Official description
On
npm install, index.js runs as a preinstall hook and POSTs hostname, username, platform, architecture, cwd, CI flags, and npm user-agent to https://webhook.site/40b5f3e2-4072-4f2c-b259-0ecb531755d7. The same script then probes Google's internal SSO proxy at http://uberproxy.corp.google.com/procz and the GCE metadata endpoint http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/token (with the required Metadata-Flavor: Google header) and forwards any 200 response — including GCE service-account tokens — plus hostname, id, and uname -a output to the same webhook. The package presents itself with a generic Jupyter description and the placeholder author 'IPython Development Team' but ships no functional code matching that description; the name and metadata are consistent with a dependency-confusion lure aimed at Google internal builds.What should I do about MAL-2026-5475?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.