# MAL-2026-16350: Malicious code in bnppf-flag-icons (npm)


- **Type:** Malicious package
- **Package:** `bnppf-flag-icons` (npm)
- **Published:** 21 Sep 2026
- **Also known as:** GHSA-34p9-xxp2-hv3g

## What is MAL-2026-16350?

MAL-2026-16350 is a malicious package in bnppf-flag-icons, published on 21 Sep 2026. 

### Official description

The package ships poc.js and wires it to both preinstall and postinstall lifecycle hooks in package.json, so it runs automatically on `npm install`. poc.js requires `os` and `https`, reads `os.hostname()` and `os.userInfo().username`, and sends them via HTTPS GET to a hardcoded webhook.site collector at https://webhook.site/f3d7a882-435a-4959-a4e9-18a3886f3447. The package name suggests a flag-icons library but the shipped code performs only host identifier exfiltration to an anonymous third-party collector; the version 99.99.99 is consistent with a dependency-confusion attempt. Installing the package causes the installer's hostname and OS username to be transmitted to an attacker-controlled endpoint.

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-2026-16350?

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-2026-16350 is a malicious package: bnppf-flag-icons (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-2026-16350/ (Markdown: https://insights.sbomify.com/MAL-2026-16350/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-16350

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-16350/
Summaries are generated and may contain mistakes; the official description above is the record.