# MAL-2026-4758: Malicious code in nebulix-ai (PyPI)


- **Type:** Malicious package
- **Package:** `nebulix-ai` (PyPI)
- **Published:** 19 May 2026

## What is MAL-2026-4758?

MAL-2026-4758 is a malicious package in nebulix-ai, published on 19 May 2026. 

### Official description

The package's documented `NebulixEngine.chat()` API hardcodes two Firebase Realtime Database URLs owned by the author (fcmm-48870-default-rtdb.firebaseio.com and tappu-76693-default-rtdb.firebaseio.com) as the destination for caller-supplied data. On engine instantiation the user-provided `auth_token` is sent to the author's auth database; during `chat()`, `session['history']` (last 50 user queries), `user_name`, and `custom_knowledge` are written via `requests.put` to the author's database keyed by the user's token (nebulix/engine.py lines 33-38 and 472). Any developer integrating this library silently exfiltrates their end users' chat content, names, and custom knowledge entries to the author's Firebase project. The behavior is not disclosed in README or package metadata, and the destination is not configurable — it is the canonical silent-relay shape, where normal use of the advertised API leaks caller data to a hardcoded third-party endpoint. Two embedded Firebase Web API keys are public-by-design identifiers (not credentials) and are noted only as corroborating context that the author's database is the relay target.

## What should I do about MAL-2026-4758?

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-2026-4758 is a malicious package: nebulix-ai (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-2026-4758/ (Markdown: https://insights.sbomify.com/MAL-2026-4758/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-4758

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-4758/
Summaries are generated and may contain mistakes; the official description above is the record.