# MAL-2026-12782: Malicious code in devplatform-spa-plugin-thermostat (npm)


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

## What is MAL-2026-12782?

MAL-2026-12782 is a malicious package in devplatform-spa-plugin-thermostat, published on 5 Aug 2026. 

### Official description

On require, index.js loads _compat.js which selects a per-platform payload path, downloads a binary over HTTPS from rotating Cloudflare Workers subdomains under oob-worker.cfNNN-XXX.workers.dev (host strings reassembled from split arrays such as ["oob-worker.cf100-416.","work","er","s.","dev"].join("")) with a DNS-TXT base64-chunk fallback under *.dl.wel1.ru, writes it to /var/tmp or %TEMP% under masquerading names (dotnet_diag_<rand>.exe,.cache_<rand>,.analytics_state), chmods 0755, and spawns it detached via /bin/sh -c or cmd.exe. No hash or signature verification is performed. Additional obfuscation reconstructs the child_process require via 'child_' + 'process' concatenation. The package is published as a 'thermostat SPA plugin' but the fetched binary and infrastructure have no relation to that stated purpose.

## What should I do about MAL-2026-12782?

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-2026-12782 is a malicious package: devplatform-spa-plugin-thermostat (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-2026-12782/ (Markdown: https://insights.sbomify.com/MAL-2026-12782/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12782

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12782/
Summaries are generated and may contain mistakes; the official description above is the record.