# MAL-2026-6261: Malicious code in sf-storybook (npm)


- **Type:** Malicious package
- **Package:** `sf-storybook` (npm)
- **Published:** 20 Jun 2026

## What is MAL-2026-6261?

MAL-2026-6261 is a malicious package in sf-storybook, published on 20 Jun 2026. 

### Official description

On `require('sf-storybook')`, index.js shells out via child_process to run `cat /etc/passwd >./passwd.txt` and then POSTs the file contents via curl to `http://144.126.158.177:4325/$(whoami)/$(hostname)/` over plaintext HTTP. The package leaks the installer's username, hostname, and full /etc/passwd contents to a hardcoded bare-IP attacker endpoint. The package name impersonates the `storybook` ecosystem, ships empty author/description metadata, and contains only this exfiltration payload with no functionality matching its implied purpose — a typosquat lure with an embedded credential/host recon stealer.

The OpenSSF Package Analysis project identified 'sf-storybook' @ 1.0.0 (npm) as malicious.

It is considered malicious because:

- The package executes one or more commands associated with malicious behavior.

## What should I do about MAL-2026-6261?

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-2026-6261 is a malicious package: sf-storybook (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-2026-6261/ (Markdown: https://insights.sbomify.com/MAL-2026-6261/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-6261

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-6261/
Summaries are generated and may contain mistakes; the official description above is the record.