# MAL-2026-2949: Malicious code in pathjoin (PyPI)


- **Type:** Malicious package
- **Package:** `pathjoin` (PyPI)
- **Published:** 20 Apr 2026

## What is MAL-2026-2949?

MAL-2026-2949 is a malicious package in pathjoin, published on 20 Apr 2026. 

### Official description

During import, the code downloads and executes encrypted payload from remote location. During analysis, remote code was prepared to download the next stage executable. This is likely selectively delivered to victims as the code polls the C2 server periodically with the local hostname and awaits the next stage to download.

---

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-04-pathjoin

Reasons (based on the campaign):

 - obfuscation

 - Downloads and executes a remote malicious script.

## What should I do about MAL-2026-2949?

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-2026-2949 is a malicious package: pathjoin (PyPI). 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-2026-2949/ (Markdown: https://insights.sbomify.com/MAL-2026-2949/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-2949

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-2949/
Summaries are generated and may contain mistakes; the official description above is the record.