test-workalendar-internal

GHSA-hv2c-g7m7-m956

Malicious code in test-workalendar-internal (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 0.0.1`

## Source: kam193 (9f36e976d0fcf254def6da62e0090bfb2dbdf76176ed316655574408c25cb9a0)
During build, the package creates a web-sharable terminal session and exposes it via a Cloudflare tunnel to the attacker.


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


Campaign: 2026-10-test-workalendar-internal


Reasons (based on the campaign):


 - backdoor


 - 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/bedf3b347240ede7d500de882787ee4ee4024de9/osv/malicious/pypi/test-workalendar-internal/MAL-2026-18092.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/test-workalendar-internal
- https://github.com/ossf/malicious-packages/blob/bedf3b347240ede7d500de882787ee4ee4024de9/osv/malicious/pypi/test-workalendar-internal/MAL-2026-18092.json
- https://github.com/ossf/malicious-packages/blob/e29c7e37b0612ba04bf703b601e4f2a2ac4a98de/osv/malicious/pypi/test-workalendar-internal/MAL-2026-18092.json
- https://pypi.org/project/test-workalendar-internal/0.0.3
- https://github.com/advisories/GHSA-hv2c-g7m7-m956

Compromised versions (1)

= 0.0.1

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