mevguard

GHSA-63jp-gfmj-fjq7

Malicious code in mevguard (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 0.1.5`

## Source: kam193 (46b2aa8c02569ef9c6bab8214553d7af8d7e1c1f3499324654bb30870832f6f5)
The obfuscated code provides "initialize_session" function that exfiltrates the provided argument.


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


Campaign: 2025-09-mevguard


Reasons (based on the campaign):


 - action-hidden-in-lib-usage


 - 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/mevguard/MAL-2025-47787.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/mevguard
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/mevguard/MAL-2025-47787.json
- https://github.com/advisories/GHSA-63jp-gfmj-fjq7

Compromised versions (1)

= 0.1.5

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