Summaryinfo

A vulnerability categorized as critical has been discovered in pyLoad up to 0.5.0b3.dev96. Affected by this vulnerability is the function set_config_value of the component API Endpoint. The manipulation results in privileges management. This vulnerability is identified as CVE-2026-33509. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in pyLoad up to 0.5.0b3.dev96. Affected is the function set_config_value of the component API Endpoint. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-33509 since 03/20/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 0.5.0b3.dev97 eliminates this vulnerability.

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Productinfo

Name

• pyLoad

Version

• 0.5.0b3.dev96

Website

• Product: https://github.com/pyload/pyload/

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