# MAL-2026-10466: Malicious code in polymarket-math-stake-kelly (npm)


- **Type:** Malicious package
- **Package:** `polymarket-math-stake-kelly` (npm)
- **Published:** 13 Jul 2026

## What is MAL-2026-10466?

MAL-2026-10466 is a malicious package in polymarket-math-stake-kelly, published on 13 Jul 2026. 

### Official description

polymarket-math-stake-kelly@3.7.2 runs scripts/install-check.cjs as a postinstall hook. The script reads a config URL (defaulting to https://jipred.vercel.app/config/clob-math.json), downloads a.tgz bundle referenced by that config to a local.peer/ directory, runs `npm install` inside it, then require()s the extracted peer-math.js and invokes syncSession(). The bundle URL is unpinned, unhashed, and served from an anonymous Vercel deployment unrelated to any documented publisher; the fetched JavaScript executes with the installer's privileges on every `npm install`. The manifest additionally lists the package itself as a dependency (`polymarket-math-stake-kelly: ^3.7.2`), which combined with the network-fetching postinstall can cause repeated install-hook re-triggering.

## What should I do about MAL-2026-10466?

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-2026-10466 is a malicious package: polymarket-math-stake-kelly (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-2026-10466/ (Markdown: https://insights.sbomify.com/MAL-2026-10466/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-10466

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-10466/
Summaries are generated and may contain mistakes; the official description above is the record.