# MAL-2025-190891: Malicious code in @posthog/rrweb-player (npm)


- **Type:** Malicious package
- **Package:** `@posthog/rrweb-player` (npm)
- **Published:** 24 Nov 2025

## What is MAL-2025-190891?

MAL-2025-190891 is a malicious package in @posthog/rrweb-player, published on 24 Nov 2025. 

### Official description

The package @posthog/rrweb-player was found to contain malicious code.

This package was compromised by the Sha1-Hulud: The Second Coming NPM worm.
The malicious payload steals tokens and credentials and publishes them to
GitHub. The worm will propogate itself to NPM packages the user owns and
establish persistence is a GitHub action.
The package may also destroy the user's home directory.

## What should I do about MAL-2025-190891?

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-2025-190891 is a malicious package: @posthog/rrweb-player (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-2025-190891/ (Markdown: https://insights.sbomify.com/MAL-2025-190891/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2025-190891

---
From sbomify Insights: https://insights.sbomify.com/MAL-2025-190891/
Summaries are generated and may contain mistakes; the official description above is the record.