metadata-checker

GHSA-5gvf-5pm7-pp25

Malicious code in metadata-checker (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 1.2.0`

## Source: kam193 (222755e960642163a0918eeb42baef3dedec6676e084a02742210fb83b7d99e5)
Disguised as metadata checker, packages are designed to exfiltrate hardcoded or given data to an obfuscated remote target


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


Campaign: 2026-02-metadata-checker


Reasons (based on the campaign):


 - exfiltration-generic


 - 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/metadata-checker/MAL-2026-762.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/metadata-checker
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/metadata-checker/MAL-2026-762.json
- https://github.com/advisories/GHSA-5gvf-5pm7-pp25

Compromised versions (1)

= 1.2.0

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