MAL-2026-12773 Malicious code in devplatform-spa-plugin-notifier (npm)
Malicious package
Published
MAL-2026-12773 is a malicious package: devplatform-spa-plugin-notifier (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-2026-12773/ (Markdown: https://insights.sbomify.com/MAL-2026-12773/index.md)
- Package
- devplatform-spa-plugin-notifier
- Registry
- npm
What is MAL-2026-12773?
MAL-2026-12773 is a malicious package in devplatform-spa-plugin-notifier, published on 5 Aug 2026.
Official description
On module load, index.js requires bootstrap.js which selects a platform-specific asset, downloads an opaque binary from hardcoded Cloudflare Workers subdomains (oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev) with a DNS TXT chunked-base64 fallback via sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru, writes it to a disguised temp path (names such as dotnet_diag* and.cache_*), chmods it 0755 on Unix, and spawns it detached via
/bin/sh -c or cmd /c start. Hostnames are assembled at runtime by joining fragmented substrings to defeat string search, and telemetry-opt-out variable names (analytics_state, DISABLE_TELEMETRY) are used as cover. No hash or signature verification is performed, and the destinations bear no relationship to a 'spa plugin notifier'.What should I do about MAL-2026-12773?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.