# MAL-2026-3639: Malicious code in briantreehttp (npm)


- **Type:** Malicious package
- **Package:** `briantreehttp` (npm)
- **Published:** 11 May 2026

## What is MAL-2026-3639?

MAL-2026-3639 is a malicious package in briantreehttp, published on 11 May 2026. 

### Official description

`briantreehttp` is a typosquatting package impersonating `braintreehttp`, the HTTP client library published by Braintree/PayPal. The package bundles the legitimate library source to appear functional while hiding a credential-theft payload in `index1.js`, which is executed at install time via the `postinstall` script.

The payload collects hostname, platform, architecture, Node.js version, UID, current working directory, all environment variables, AWS credentials (`~/.aws/credentials`, `~/.aws/config`), npm tokens from `.npmrc` files (root, home, and working directory), Docker config (`~/.docker/config.json`), git config, `.netrc`, yarn config, npm global config, directory listings of the working directory, home, filesystem root, and `/etc`, network configuration files (`/etc/resolv.conf`, `/etc/hosts`, `/proc/net/route`), and AWS ECS/EC2 instance metadata from internal endpoints. All collected data is base64-encoded and exfiltrated via HTTPS POST to `reportviewer.click/collect/`. A secondary DNS-based exfiltration channel encodes environment variables into a subdomain and issues a request to `dns.reportviewer.click`.

## What should I do about MAL-2026-3639?

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-2026-3639 is a malicious package: briantreehttp (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-2026-3639/ (Markdown: https://insights.sbomify.com/MAL-2026-3639/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-3639

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-3639/
Summaries are generated and may contain mistakes; the official description above is the record.