larchworker

GHSA-jw6c-mfj3-856p

Malicious code in larchworker (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 0.1.0`

## Source: kam193 (87e174c9dc2485263894e4d6c3d1560589659afbfbe9397ca1e1b53fb21d96b3)
This campaign consists of similar loader packages, which provide executing code from a given URL. While they do not contain the malicious payload and the usage remains unknown, they are clearly a coordinated campaign to place multiple deceptive ways to load malicious code.


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


Campaign: 2026-10-voice-synthesis-profiles


Reasons (based on the campaign):


 - other


 - Downloads and executes a remote malicious script.

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/2283c715e3dad43d489da73c5125720deb01118f/osv/malicious/pypi/larchworker/MAL-2026-18230.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/larchworker
- https://github.com/ossf/malicious-packages/blob/2283c715e3dad43d489da73c5125720deb01118f/osv/malicious/pypi/larchworker/MAL-2026-18230.json
- https://github.com/advisories/GHSA-jw6c-mfj3-856p

Compromised versions (1)

= 0.1.0

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.