# MAL-2026-10059: Malicious code in cookie-parser-es (npm)


- **Type:** Malicious package
- **Package:** `cookie-parser-es` (npm)
- **Published:** 9 Jul 2026

## What is MAL-2026-10059?

MAL-2026-10059 is a malicious package in cookie-parser-es, published on 9 Jul 2026. 

### Official description

Package name and metadata impersonate the widely-used `cookie-parser` middleware: README, API surface, and `package.json` author (`TJ Holowaychuk <tj@vision-media.ca>`) and repository (`expressjs/js-cookie-parser`) are copied from the legitimate package, with an additional contributor `jeandupontmail24@gmail.com` appended. The factory in `index.js` lines 39-41 calls `var Cookies = require('cookie-ease'); Cookies.set("", "", {expires: 0})` — `cookie-ease` is NOT declared in `dependencies` and is loaded/executed the moment a consumer wires the middleware following the README's `app.use(cookieParser())` example. A second related package `set-cookie-ease` is declared in `dependencies` pinned to `"latest"` (mutable), allowing the maintainer to swap the executed payload after registry scans pass. The combination of name confusion against a top-100 npm package, identity impersonation of a well-known author, runtime loading of an undeclared sister package, and a mutable `latest` pin matches the standard typosquat-dropper supply-chain attack shape.

## What should I do about MAL-2026-10059?

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-2026-10059 is a malicious package: cookie-parser-es (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-2026-10059/ (Markdown: https://insights.sbomify.com/MAL-2026-10059/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-10059

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-10059/
Summaries are generated and may contain mistakes; the official description above is the record.