1h1

GHSA-qhcw-fg3c-m9r7

Malicious code in 1h1 (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 1.0.0`

## Source: kam193 (04938e0ebf8781fb6c986fda09db9f4a60c240eb6dc79ab33e6faf7a5589b353)
During installation, package downloads and executes malware.


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


Campaign: 2026-10-semvver


Reasons (based on the campaign):


 - Downloads and executes a remote executable.


 - malware


 - typosquatting

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/c3be28cce503587e333ad2e77abb4c86c75244d3/osv/malicious/pypi/1h1/MAL-2026-18188.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/1h1
- https://github.com/ossf/malicious-packages/blob/c3be28cce503587e333ad2e77abb4c86c75244d3/osv/malicious/pypi/1h1/MAL-2026-18188.json
- https://www.virustotal.com/gui/file/e6d96b5500b232bea67f6f9046cfbc22d29a515c42d2af9523a15ebe8a7c4ab7
- https://github.com/ossf/malicious-packages/blob/65a30c2bd1748889a5fb95a96da4a49b781c4b60/osv/malicious/pypi/1h1/MAL-2026-18188.json
- https://github.com/advisories/GHSA-qhcw-fg3c-m9r7

Compromised versions (1)

= 1.0.0

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