urc

GHSA-3c7m-3qhf-wqrr

Malicious code in urc (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 99.99.99`

## Source: kam193 (abbaafd909f0cd09835c29c401432a9aa6094c2007973ba23e70f3fe06b07785)
Installing the package or importing the module exfiltrates basic information about the host, and the package has no other purpose.


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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-standard-pypi-install-pentest


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.


 - The package overrides the install command in setup.py to execute malicious code during installation.

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/431301216f0d4578692f6ebae82412381549d642/osv/malicious/pypi/urc/MAL-2026-16298.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/urc
- https://github.com/ossf/malicious-packages/blob/431301216f0d4578692f6ebae82412381549d642/osv/malicious/pypi/urc/MAL-2026-16298.json
- https://github.com/advisories/GHSA-3c7m-3qhf-wqrr

Compromised versions (1)

= 99.99.99

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