MAL-2026-18297Critical▾ Abyssal⚠ Exploited in the wildMalicious code in nebulallm (PyPI)
▾ Abyssal zone — Critical with a public exploit or in-the-wild use
impact 52.3 · likelihood 0 · exploitation 18
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Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
-= Per source details. Do not edit below this line.=-
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.
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
nebulallmRefer to the advisory for the patched release.