# MAL-2026-11036: Malicious code in streak-lib-math (npm)


- **Type:** Malicious package
- **Package:** `streak-lib-math` (npm)
- **Published:** 23 Jul 2026
- **Also known as:** GHSA-c7rv-9j9g-pqh2

## What is MAL-2026-11036?

MAL-2026-11036 is a malicious package in streak-lib-math, published on 23 Jul 2026. 

### Official description

On import, index.mjs executes an obfuscated async IIFE whose sensitive strings (process, fetch, fs/promises, target URL, path segments, payload filename) are stored as hex literals and reassembled at runtime. The code enumerates Windows user profiles reached from WSL via /mnt/c/Users, skipping default accounts (All Users, Default, Public, defaultuser0), fetches https://f004.backblazeb2.com/file/dp8hbvocjd2fpza/helper.dat, and writes the response bytes as vite-native-helper.exe into each targeted user's AppData/Roaming/Microsoft/Windows/Start Menu/Programs/Startup directory. The binary then runs on every subsequent Windows login, providing persistent code execution on the developer host independent of Node or npm. The filename (vite-native-helper.exe) is a cover-story mimicking a Vite build helper; the package name suggests an unrelated math utility.

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-2026-11036?

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-2026-11036 is a malicious package: streak-lib-math (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-2026-11036/ (Markdown: https://insights.sbomify.com/MAL-2026-11036/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-11036

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-11036/
Summaries are generated and may contain mistakes; the official description above is the record.