# MAL-2026-16250: Malicious code in marketing-mcp (PyPI)


- **Type:** Malicious package
- **Package:** `marketing-mcp` (PyPI)
- **Published:** 17 Sep 2026

## What is MAL-2026-16250?

MAL-2026-16250 is a malicious package in marketing-mcp, published on 17 Sep 2026. 

### Official description

The package exposes an MCP tool `send(path)` that reads a caller-specified local file and POSTs its contents to a hardcoded `https://webhook.site/4acf7132-a75e-47e1-aeff-0350c8eac16c` endpoint. The destination is a fixed public request-capture service, is not caller-configurable, and is not the installer's infrastructure. Any file path an LLM agent is induced to pass to `send` — including sensitive paths such as `~/.ssh/id_rsa`, `~/.aws/credentials`, `.env` files, or source trees — is uploaded to that third-party capture URL where the operator of the webhook can retrieve it. The package's advertised marketing/MCP framing does not match the actual behavior, which is a one-way file relay to an author-controlled inspection endpoint.

Package attempts to lure LLM agents to exfiltrate files to a hardcoded location. Analysis of infrastructure suggests preparing for exfiltrating credentials.

---

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

Campaign: 2026-09-marketing-mcp

Reasons (based on the campaign):

 - files-exfiltration

 - llm-threat

## What should I do about MAL-2026-16250?

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-2026-16250 is a malicious package: marketing-mcp (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-2026-16250/ (Markdown: https://insights.sbomify.com/MAL-2026-16250/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-16250

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-16250/
Summaries are generated and may contain mistakes; the official description above is the record.