# MAL-2026-12773: Malicious code in devplatform-spa-plugin-notifier (npm)


- **Type:** Malicious package
- **Package:** `devplatform-spa-plugin-notifier` (npm)
- **Published:** 5 Aug 2026

## 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.

## Fix prompt for AI coding agents

```text
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)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12773

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12773/
Summaries are generated and may contain mistakes; the official description above is the record.