pyLoad up to 0.5.0b3.dev100 EventManager event_manager.py get_events denial of service

Summaryinfo

A vulnerability described as problematic has been identified in pyLoad. This impacts the function get_events of the file src/pyload/core/managers/event_manager.py of the component EventManager. Executing a manipulation can lead to denial of service. This vulnerability appears as CVE-2026-48987. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in pyLoad and classified as problematic. This vulnerability affects the function get_events of the file src/pyload/core/managers/event_manager.py of the component EventManager. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. CVE summarizes:

pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev101, EventManager in src/pyload/core/managers/event_manager.py appends a Client object to the clients list for each unique uuid submitted to the authenticated getEvents API endpoint, but get_events does not invoke the available clean method to remove inactive clients. An authenticated user can repeatedly submit unique UUID values, causing retained client objects and process memory to grow without bound even after requests stop. The resulting memory exhaustion can trigger an operating-system out-of-memory termination of pyLoad or host-wide instability and denial of service. This issue is fixed in version 0.5.0b3.dev101.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-48987 since 05/27/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 0.5.0b3.dev101 eliminates this vulnerability.

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Productinfo

Name

• pyLoad

Version

• 0.5.0b3.dev31
• 0.5.0b3.dev32
• 0.5.0b3.dev33
• 0.5.0b3.dev36
• 0.5.0b3.dev40
• 0.5.0b3.dev41
• 0.5.0b3.dev42
• 0.5.0b3.dev44
• 0.5.0b3.dev75
• 0.5.0b3.dev77
• 0.5.0b3.dev78
• 0.5.0b3.dev79
• 0.5.0b3.dev87
• 0.5.0b3.dev88
• 0.5.0b3.dev89
• 0.5.0b3.dev90
• 0.5.0b3.dev91
• 0.5.0b3.dev92
• 0.5.0b3.dev97
• 0.5.0b3.dev98
• 0.5.0b3.dev100

Website

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

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