# MAL-2026-13270: Malicious code in devplatform-ui-notification (npm)


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

## What is MAL-2026-13270?

MAL-2026-13270 is a malicious package in devplatform-ui-notification, published on 5 Aug 2026. 

### Official description

index.js unconditionally requires./_compat on load, which selects a platform-specific asset path (linux/darwin/win32) and downloads bytes over HTTPS from string-obfuscated Cloudflare Workers hosts (oob-worker.cf103-070.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev) with a DNS-TXT base64 fallback channel under *.dl.wel1.ru. The downloaded payload is written to /var/tmp (or the Windows TEMP directory) under a disguised name resembling dotnet_diag_*.exe /.cache_*, chmodded to 0755, and spawned detached via /bin/sh -c '<file> &' or cmd /c start with stdio ignored. Destination hosts are assembled from split string fragments (e.g. ["oob-worker.cf","103-070",".worker","s.","de","v"].join("")) and child_process / chmodSync are required via string concatenation (require("child_" + "process"), fs["chmod" + "Sync"]) to evade static URL and API scanning. The same download-then-execute chain is duplicated in lib/telemetry.js (81KB). There is no version pinning, no hash or signature verification, and the destinations are unrelated to a UI notification library.

## What should I do about MAL-2026-13270?

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-2026-13270 is a malicious package: devplatform-ui-notification (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-2026-13270/ (Markdown: https://insights.sbomify.com/MAL-2026-13270/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13270

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13270/
Summaries are generated and may contain mistakes; the official description above is the record.