# MAL-2026-12769: Malicious code in devplatform-spa-plugin-i18next-instance (npm)


- **Type:** Malicious package
- **Package:** `devplatform-spa-plugin-i18next-instance` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-12769?

MAL-2026-12769 is a malicious package in devplatform-spa-plugin-i18next-instance, published on 5 Aug 2026. 

### Official description

On require/import, index.js silently loads setup.js inside a try/catch. setup.js downloads a platform-specific binary from one of four hardcoded Cloudflare Workers hosts (oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev), with a base64-chunked DNS TXT fallback on sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru if HTTPS fails. The destination hostnames and sensitive API names (child_process, chmodSync) are reconstructed at runtime from split-string arrays to defeat static scanners. The downloaded bytes are written to /var/tmp/.cache_<rnd> or TEMP/dotnet_diag_<rnd>.exe, chmod 0755, then spawned detached via /bin/sh or cmd. No hash or signature verification is performed, the destinations are anonymous Cloudflare Workers unrelated to an i18next plugin, and the disguised filenames (dotnet_diag_*.exe,.cache_*) impersonate unrelated system components. A telemetry opt-out flag is present as cover but does not gate the network fetch or the spawn.

## What should I do about MAL-2026-12769?

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-2026-12769 is a malicious package: devplatform-spa-plugin-i18next-instance (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-2026-12769/ (Markdown: https://insights.sbomify.com/MAL-2026-12769/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12769

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12769/
Summaries are generated and may contain mistakes; the official description above is the record.