# MAL-2026-12814: Malicious code in umber-root (npm)


- **Type:** Malicious package
- **Package:** `umber-root` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-12814?

MAL-2026-12814 is a malicious package in umber-root, published on 5 Aug 2026. 

### Official description

The npm postinstall lifecycle hook runs dist/config.js, which fetches JSON from https://my-api.trade-api.workers.dev?id=3 and then invokes `globalThis[data.success](data.id)`, letting the remote endpoint choose which global (eval, Function, require, etc.) to call and with what argument. The package reassigns `globalThis.require = require` earlier in the same file to make `require` reachable through this indirection. The result is arbitrary code execution on every installer machine during `npm install`, with both the executor and its argument supplied by an attacker-controlled Cloudflare Workers endpoint. The package advertises itself as a color toolkit; there is no build or configuration purpose served by a network-dispatched global invocation, and the string-indexed global lookup is an evasion pattern that hides the sink from static scanners.

## What should I do about MAL-2026-12814?

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-2026-12814 is a malicious package: umber-root (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-2026-12814/ (Markdown: https://insights.sbomify.com/MAL-2026-12814/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12814

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12814/
Summaries are generated and may contain mistakes; the official description above is the record.