# MAL-2026-12041: Malicious code in platform-ui-codemods (npm)


- **Type:** Malicious package
- **Package:** `platform-ui-codemods` (npm)
- **Published:** 5 Aug 2026
- **Also known as:** GHSA-wc85-c9g8-72g6

## What is MAL-2026-12041?

MAL-2026-12041 is a malicious package in platform-ui-codemods, published on 5 Aug 2026. 

### Official description

On require() of the package, index.js loads./_compat.js whose top-level init() downloads a platform-specific binary from a set of Cloudflare Workers mirrors whose hostnames are assembled at runtime from split-string arrays joined with.join("") (e.g. oob-worker.cf1*.workers.dev), with a DNS-TXT covert-channel fallback that reconstructs a base64 payload from chunked TXT records under c.<domain>/<n>.<domain> at *.dl.well1.site (tin/tina/ldr/win subdomains). The fetched bytes are written to a hidden/decoy path ("/tmp/.cache_<hex>" on Unix, "%TEMP%\dotnet_diag_<hex>.exe" on Windows), chmod 0755, and spawned detached via /bin/sh -c or cmd.exe with a cooldown stamp file (".analytics_state") to avoid re-execution. Hostname obfuscation, decoy filenames, DNS-TXT egress fallback, and detached execution collectively indicate a staged remote-code-execution dropper that fires automatically on install/require of this package.

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-2026-12041?

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-2026-12041 is a malicious package: platform-ui-codemods (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-2026-12041/ (Markdown: https://insights.sbomify.com/MAL-2026-12041/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12041

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-12041/
Summaries are generated and may contain mistakes; the official description above is the record.