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OpenAdvisories
Malicious MAL-2026-2534

siempyl-sumo

PyPI package · versions 0.0.1

Reported Apr 10, 2026 · Updated Apr 10, 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 (493e667735febe5b3e4cd2cc47ae0b5a09ddacf051dc2804e5e742574ceb5ec4)
Dependency confusion attempt. The user identifies themselves as a HackerOne user abusing the PyPI for the purpose of a bug bounty program. This package did not contain any exfiltration activity.

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Category: PROBABLY_PENTEST - Packages looking like typical pentest packages, but also anything that looks like testing, exploring pre-prepared kits, research & co, with clearly low-harm possibilities.

Campaign: GENERIC-hackerone-bugbounty

Reasons (based on the campaign):

- The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.

- dependency-confusion