coreloader

GHSA-53j9-5473-95v4

Malicious code in coreloader (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 1.0.0`

## Source: kam193 (f5d7c219be7c779fe573e80949a521df2a096e7358be92f99cee6a50dd252e09)
During importing, code starts a malicious script performing exfiltration of sensitive data and credentials from e.g. browsers and Discord clients to a remote location.


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


Campaign: 2026-03-coreloader


Reasons (based on the campaign):


 - infostealer


 - exfiltration-credentials


 - exfiltration-browser-data


 - spyware-like

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/coreloader/MAL-2026-2140.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/coreloader
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/coreloader/MAL-2026-2140.json
- https://github.com/advisories/GHSA-53j9-5473-95v4

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.