CVE-2026-50558: Brightio Penelope

Medium severity, CVSS 5.9. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Brightio Penelope: before 0.20.0 (fixed in 0.20.0)

Published 2026-07-29. Last modified 2026-09-10.