parsimonius

GHSA-mf92-vjvw-9h32

Malicious code in parsimonius (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 0.10.0`

## Source: kam193 (a5ab85a46a37da928774b1885049b71d40d675c54683b13711f4e371d932394a)
Clone of a legitimate package with an added RAT running through a Telegram bot. It can e.g. exfiltrate env variables and execute remote commands. The malicious action does not start if the geolocation or timezone suggests a Russian area.


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


Campaign: 2026-06-parsimonius


Reasons (based on the campaign):


 - typosquatting


 - exfiltration-env-variables


 - The package contains code to execute remote commands (probably limited to a specific set) on the victim's machine.


 - rat


 - clones-real-package


 - abuses-pth


 - geo-restricted


 - uses-telegram-bot

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/parsimonius/MAL-2026-5151.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/parsimonius
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/parsimonius/MAL-2026-5151.json
- https://github.com/advisories/GHSA-mf92-vjvw-9h32

Compromised versions (1)

= 0.10.0

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