rc4-secure

GHSA-q3mh-hmf4-7c8m

Malicious code in rc4-secure (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 1.0.0`

## Source: kam193 (c00d4194b32151e318678fb20166e9023d74acbed43e4a9d82f7834569cb73bd)
Package silently installs a remote executable in a way that is intentionally hidden from the user. During analysis, the code was downloading a legitimate software unrelated to provided functionality, suggesting it is a research-like demonstration.


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


Campaign: 2026-08-rc4-secure


Reasons (based on the campaign):


 - Downloads and executes a remote executable.


 - modify-system-without-consent


 - action-hidden-in-lib-usage

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/95a79a3d6ded5111b034d760f9f83c88ad44eed5/osv/malicious/pypi/rc4-secure/MAL-2026-14306.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/rc4-secure
- https://github.com/ossf/malicious-packages/blob/95a79a3d6ded5111b034d760f9f83c88ad44eed5/osv/malicious/pypi/rc4-secure/MAL-2026-14306.json
- https://github.com/ossf/malicious-packages/blob/194dd8bdd319e55a901cff0a1ffcb9dd584b3b08/osv/malicious/pypi/rc4-secure/MAL-2026-14306.json
- https://pypi.org/project/rc4-secure/1.0.0
- https://github.com/advisories/GHSA-q3mh-hmf4-7c8m

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.