# MAL-2026-12735: Malicious code in devplatform-react-form (npm)


- **Type:** Malicious package
- **Package:** `devplatform-react-form` (npm)
- **Published:** 5 Aug 2026
- **Also known as:** GHSA-wj9c-c8rr-53vv

## What is MAL-2026-12735?

MAL-2026-12735 is a malicious package in devplatform-react-form, published on 5 Aug 2026. 

### Official description

On require('devplatform-react-form'), index.js loads _adapter.js which fetches a platform-specific native binary from hardcoded Cloudflare Workers endpoints (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT chunked fallback via sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru, writes the payload to /tmp or %TEMP% under deceptive names (.cache_<hex>, dotnet_diag_<hex>.exe), chmods it 0o755, and spawns it detached via cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true, stdio:'ignore'}).unref(), using a stamp file to avoid re-execution. Host and API strings are assembled from split fragments (e.g. ["oob-worker.cf102-baf.wo","rk","ers.de","v"].join(""), require('child_'+'process')) to evade static analysis. lib/telemetry.js contains a parallel dropper under an 'Analytics SDK' cover story using the same base64-chunk-decode + chmod 0o755 + cp.spawn('/bin/sh',...) pattern. The package advertises itself as a React form library but ships no form code; the fetched binary is unrelated to any documented purpose and delivers full-host code execution to any process that imports the module.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

## What should I do about MAL-2026-12735?

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-2026-12735 is a malicious package: devplatform-react-form (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-2026-12735/ (Markdown: https://insights.sbomify.com/MAL-2026-12735/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12735

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12735/
Summaries are generated and may contain mistakes; the official description above is the record.