# MAL-2026-14307: Malicious code in express-route-engine (npm)


- **Type:** Malicious package
- **Package:** `express-route-engine` (npm)
- **Published:** 19 Aug 2026

## What is MAL-2026-14307?

MAL-2026-14307 is a malicious package in express-route-engine, published on 19 Aug 2026. 

### Official description

On require/import, index.js immediately invokes an initializer that HTTP-GETs a JSON document from https://api.jsonbin.io/v3/b/6a4f5816f5f4af5e29762c92, extracts the `record.cerookie` field, and executes its contents as JavaScript via `new (Function.constructor)('require',...)(require)`. The evaluated code runs with full Node.js privileges and access to `require`, and the payload is hosted on a third-party mutable JSON store controlled by the package author, so the executed code can change at any time without republishing. The file is cover-labeled as `normalize-path (ES6 safe version)` and contains an unused normalizePath helper and a `Safe request helper` comment to obscure the loader; the Function constructor is reached indirectly via `Function.constructor` and the payload field is named `cerookie` to reduce recognizability. The stated purpose (an Express route engine) has no legitimate need to fetch and evaluate remote code on load.

## What should I do about MAL-2026-14307?

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-2026-14307 is a malicious package: express-route-engine (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-2026-14307/ (Markdown: https://insights.sbomify.com/MAL-2026-14307/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-14307

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-14307/
Summaries are generated and may contain mistakes; the official description above is the record.