# MAL-2026-6135: Malicious code in ratelimitsucks (npm)


- **Type:** Malicious package
- **Package:** `ratelimitsucks` (npm)
- **Published:** 18 Jun 2026
- **Also known as:** GHSA-x94f-fgw2-crm2

## What is MAL-2026-6135?

MAL-2026-6135 is a malicious package in ratelimitsucks, published on 18 Jun 2026. 

### Official description

Package is not a library. `main` points at `sw.js`, a browser Service Worker that uses `importScripts`, `self.addEventListener('fetch'|'install'|'activate')`, and `self.clients.claim()` — all undefined in Node, so `require('ratelimitsucks')` throws on the first line. There are no install lifecycle hooks (`scripts` only declares `test`), so `npm install` of this package does not auto-execute any code on the installer's machine. The shipped contents are a school-filter-bypass web proxy (12 heavily obfuscated `assets/*.js` files with hex-mangled identifiers, a Service Worker that rewrites HTML responses and intercepts navigation), an `index.html` cover page ("Riverbend Tutoring") that loads a third-party script from `cdn.21baseballacademy.com` and opens a popunder to `abdct.com`, and an `auto-publish.sh` script that loops i=1..10, rewrites `package.json.name` to `ratelimitsucks`, `ratelimitsucks1`,..., `ratelimitsucks9`, and runs `npm publish` for each — the author's own mass-publication pipeline shipped inside the tarball. Direct harm to a developer who installs this package is effectively nil (no hooks, no require-safe entry point). The harms are (a) abuse of the npm registry as a CDN for an unrelated proxy site, (b) demonstrated typosquat-name-squatting intent across 10 sibling names, and (c) a popunder ad redirect served from the cover page. Routing to human review for unpublish/registry-abuse handling rather than blocking as an installer-side supply-chain attack.

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-2026-6135?

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-2026-6135 is a malicious package: ratelimitsucks (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-2026-6135/ (Markdown: https://insights.sbomify.com/MAL-2026-6135/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-6135

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-6135/
Summaries are generated and may contain mistakes; the official description above is the record.