Vulnerability Description
Penelope Shell Handler is a post-exploitation shell handler for authorized security testing. Prior to 0.20.0, the Unix download() implementation in penelope.py used tar.extractall(local_download_folder) on tar archives returned by remote sessions without validating member paths, allowing a malicious or compromised session to write files outside the intended download directory and potentially overwrite ~/.penelope/peneloperc. This issue is fixed in version 0.20.0.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/brightio/penelope/commit/a040afb5db32c7e80b5e8a2f9b2164cf911c
- https://github.com/brightio/penelope/releases/tag/v0.20.0
- https://github.com/brightio/penelope/security/advisories/GHSA-f42x-p2mx-hm8r
- https://github.com/brightio/penelope/security/advisories/GHSA-f42x-p2mx-hm8r
FAQ
What is CVE-2026-50558?
CVE-2026-50558 is a vulnerability with a CVSS score of 5.9 (MEDIUM). Penelope Shell Handler is a post-exploitation shell handler for authorized security testing. Prior to 0.20.0, the Unix download() implementation in penelope.py used tar.extractall(local_download_folde...
How severe is CVE-2026-50558?
CVE-2026-50558 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-50558?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.