---
id: "MAL-2026-18297"
kind: "package"
aliases: ["MAL-2026-18297"]
title: "Malicious code in nebulallm (PyPI)"
severity: "critical"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "nebulallm", "fixed": [], "affected": "= 1.4.3", "ecosystem": "pypi"}]
ecosystems: ["pypi"]
tags: ["malicious", "package"]
not_affected_if: []
published_at: "2026-10-25T20:15:01+00:00"
first_seen_at: "2026-10-26T20:52:03+00:00"
updated_at: "2026-10-26T21:05:48+00:00"
sources: [{"source": "osv-malicious", "url": "https://osv.dev/vulnerability/MAL-2026-18297", "first_seen_at": "2026-10-26T20:52:03+00:00"}]
---

# Malicious code in nebulallm (PyPI)

## Affected

- pypi:nebulallm affected = 1.4.3 fixed ?

## Timeline

- 2026-10-26T20:52:03+00:00 osv-malicious https://osv.dev/vulnerability/MAL-2026-18297

## From the sources

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_-= Per source details. Do not edit below this line.=-_

## Source: amazon-inspector (5428d0f2f07674817697574b1993211dfa902bad746d8cd6efc1ad6b1fbbfd90)
nebulallm 1.4.3 presents itself as an AI API client stub but ships a custom install command class in setup.py that executes on `pip install`. The install hook spawns regsvr32.exe with the squiblydoo LOLBin pattern (`regsvr32 -s -i:<url> scrobj.dll`) to fetch and execute a remote COM scriptlet from https://akinomoreno.pythonanywhere.com/faye on the installer's Windows host. The subprocess is launched with DETACHED_PROCESS and stdin/stdout/stderr redirected to DEVNULL, so the dropper runs silently and produces no output during pip install. The declared package functionality is unrelated to the install-time behavior, consistent with a dropper staged behind a cover-story package.

## Source: kam193 (50e0ed125f08fd7743ccfb40590c24304b4731f6a99b69bc553b5bb8b7e57fc6)
During installation package first downloads a JScript script, which then downloads the next malicious DLL.


---

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


Campaign: 2026-10-nebulallm


Reasons (based on the campaign):


 - typosquatting


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


 - Downloads and executes a remote executable.


 - Downloads and executes a remote malicious script.


 - malware

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