CVE-2026-33509: Pyload

High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days.

pyLoad is a free and open-source download manager written in Python. From version 0.4.0 to before version 0.5.0b3.dev97, the set_config_value() API endpoint allows users with the non-admin SETTINGS permission to modify any configuration option without restriction. The reconnect.script config option controls a file path that is passed directly to subprocess.run() in the thread manager's reconnect logic. A SETTINGS user can set this to any executable file on the system, achieving Remote Code Execution. The only validation in set_config_value() is a hardcoded check for general.storage_folder — all other security-critical settings including reconnect.script are writable without any allowlist or path restriction. This issue has been patched in version 0.5.0b3.dev97.

Affected products

• Pyload Pyload: from 0.4, up to and including 0.4.20
• Pyload-NG Project Pyload-NG: from 0.5.0a5.dev528, before 0.5.0b3.dev97 (fixed in 0.5.0b3.dev97)

Published 2026-03-24. Last modified 2026-06-17.