CVE-2026-48987 PUBLISHED

pyLoad: Unbounded Memory Growth Leading to DoS and Potential DDoS in EventManager

Assigner: GitHub_M
Reserved: 26.05.2026 Published: 15.09.2026 Updated: 15.09.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 6.5

Product Status

Vendor pyload
Product pyload
Versions
  • Version < 0.5.0b3.dev101 is affected

References

Problem Types

  • CWE-400: Uncontrolled Resource Consumption CWE
  • CWE-401: Missing Release of Memory after Effective Lifetime CWE
  • CWE-770: Allocation of Resources Without Limits or Throttling CWE