Vulnerability · Published Sep 15, 2026 · Assigned by GitHub_M
CVE-2026-48987pyLoad: Unbounded Memory Growth Leading to DoS and Potential DDoS in EventManager
Medium 6.5
In plain English
A medium-severity uncontrolled resource consumption in pyload from pyload. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | pyload-ng | no fix listed | GHSA-c2f9-4mc8-j656 |
| PyPI | pyload-ng | no fix listed | PYSEC-2026-2992 |
Affected products (as reported)
Weakness: CWE-400, CWE-401, CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H