# MAL-2026-12765: Malicious code in devplatform-spa-plugin-dom-render (npm)


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

## What is MAL-2026-12765?

MAL-2026-12765 is a malicious package in devplatform-spa-plugin-dom-render, published on 5 Aug 2026. 

### Official description

index.js unconditionally requires./_platform on module load. _platform.js assembles endpoint hostnames at runtime by joining string fragments (evading static analysis), downloads a platform-specific native binary over HTTPS from randomized Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS-TXT fallback channel that base64-decodes chunked TXT records from sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. The fetched payload is written to /var/tmp/.cache_<hex> or %TEMP%\dotnet_diag_<hex>.exe, chmodded 0755, and spawned detached via /bin/sh -c or cmd.exe /c start. A sibling file lib/telemetry.js contains a duplicate dropper implementation (base64 buffers, cp.spawn write-and-exec, chmod 0755) that is not reachable from the current entrypoint but mirrors the same capability.

## What should I do about MAL-2026-12765?

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-2026-12765 is a malicious package: devplatform-spa-plugin-dom-render (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-2026-12765/ (Markdown: https://insights.sbomify.com/MAL-2026-12765/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12765

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12765/
Summaries are generated and may contain mistakes; the official description above is the record.