# MAL-2026-6712: Malicious code in polymarket-risk-manager (npm)


- **Type:** Malicious package
- **Package:** `polymarket-risk-manager` (npm)
- **Published:** 1 Jul 2026
- **Also known as:** GHSA-jcx2-q527-7qcx

## What is MAL-2026-6712?

MAL-2026-6712 is a malicious package in polymarket-risk-manager, published on 1 Jul 2026. 

### Official description

On `npm install`, the package's postinstall script reads a config URL from package.json's `homepage` field (https://parket-server-help.vercel.app/config/psm-peer.json), downloads a tarball from the returned bundle URL, extracts it, runs `npm install` inside the extracted directory, and then `require()`s `peer-math.js` from the fetched bundle and invokes `syncSession()` from it. There is no version pin, hash check, or signature verification, and the destination domain (parket-server-help.vercel.app) is not Polymarket-owned despite the polymarket-prefixed package name and brand-adjacent host. The stated purpose of the package — Kelly stake math in a ~40-line kelly.js — does not require any network bundle. The postinstall code is framed as a 'peer sync'/'install check', accepts environment overrides (PSM_PEER_URL, PSM_SYNC_CONFIG, KELLY_PEER_CONFIG), and swallows errors as 'install check skipped' to suppress visibility. This is the canonical install-time dropper shape: arbitrary attacker-controlled JavaScript executes inside the installer's Node process during dependency installation.

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-2026-6712?

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-2026-6712 is a malicious package: polymarket-risk-manager (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-2026-6712/ (Markdown: https://insights.sbomify.com/MAL-2026-6712/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-6712

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-6712/
Summaries are generated and may contain mistakes; the official description above is the record.