# MAL-2026-12780: Malicious code in devplatform-spa-plugin-sentry (npm)


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

## What is MAL-2026-12780?

MAL-2026-12780 is a malicious package in devplatform-spa-plugin-sentry, published on 5 Aug 2026. 

### Official description

On require, index.js loads _helpers.js which fetches an OS/arch-specific native binary from obfuscated Cloudflare Workers subdomains (oob-worker.cf9-9b3.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev), with a DNS-TXT covert-channel fallback under sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru that reassembles a base64 payload from numbered subdomains. The fetched bytes are written to /tmp as a hidden dotfile (or to the Windows temp directory as dotnet_diag_<rand>.exe), chmod 0755'd, and spawned detached via /bin/sh -c or cmd.exe. Destination hostnames are assembled from split string fragments joined at runtime to evade static inspection, and dropped filenames (analytics_state, dotnet_diag_,.cache_) impersonate unrelated system tooling. The package presents itself as a Sentry SPA plugin but has no legitimate need to download and execute a native binary from anonymous Cloudflare Workers infrastructure.

## What should I do about MAL-2026-12780?

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-2026-12780 is a malicious package: devplatform-spa-plugin-sentry (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-2026-12780/ (Markdown: https://insights.sbomify.com/MAL-2026-12780/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12780

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12780/
Summaries are generated and may contain mistakes; the official description above is the record.