oncecall

GHSA-pwh4-5cm3-jqm6

Malicious code in oncecall (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 0.1.0`

## Source: kam193 (30fc3993415d365e03d500864542d91d6c6d87af8b6125765af3ba4a5ee059f6)
Package silently downloads and executes an infostealer


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


Campaign: 2026-01-oncecall


Reasons (based on the campaign):


 - infostealer


 - Downloads and executes a remote executable.


 - obfuscation

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/oncecall/MAL-2026-189.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/oncecall
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/oncecall/MAL-2026-189.json
- https://tria.ge/260110-p4hwvagv5a/behavioral1
- https://www.virustotal.com/gui/file/146275dfb0c908097bc37eb8c38de6a7f720a0a25aa1423a182ac873601880c3/detection
- https://github.com/advisories/GHSA-pwh4-5cm3-jqm6

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.