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OpenAdvisories
Malicious MAL-2026-5151

parsimonius

PyPI package · versions 0.10.0, 0.11.0, 0.11.1, 0.11.2, 0.11.3, 0.11.4, 0.11.5, 0.11.6, 0.12.0

Reported Jun 2, 2026 · Updated Jun 2, 2026

If this package is installed

Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.

Details

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