# MAL-2026-13271: Malicious code in devplatform-utils (npm)


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

## What is MAL-2026-13271?

MAL-2026-13271 is a malicious package in devplatform-utils, published on 5 Aug 2026. 

### Official description

devplatform-utils@35.5.2 ships an index.js whose main module require()s _bootstrap.js, which on load downloads a platform-specific binary payload from string-split-obfuscated Cloudflare Workers endpoints (e.g. oob-worker.cf103-070.workers.dev) with a DNS-TXT fallback via *.dl.wel1.ru. The payload is written to /var/tmp/.cache_<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows, chmod 0755'd, and spawned detached via /bin/sh -c '<path> &' or cmd.exe /c start /b. Destination hostnames are assembled at runtime by.join('') on fragmented string arrays (_NODES, _DNS_MAP) to evade static string scans, and the dropped file is given cover-story names (dotnet_diag_*,.cache_*,.analytics_state). A rate-limit token stored at /tmp/.analytics_state (EXPIRE_SEC=21227, ~5.9 hours) causes the remote binary to be re-fetched and re-executed on subsequent require() calls, providing a persistent operator-controlled code-delivery channel. Environment variables DISABLE_TELEMETRY / DO_NOT_TRACK are checked as a cover story consistent with a legitimate telemetry opt-out. No hash or signature verification is performed on the fetched binary.

## What should I do about MAL-2026-13271?

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-2026-13271 is a malicious package: devplatform-utils (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-2026-13271/ (Markdown: https://insights.sbomify.com/MAL-2026-13271/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13271

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13271/
Summaries are generated and may contain mistakes; the official description above is the record.