---
id: CVE-2026-48987
title: pyLoad is a free and open-source download manager written in Python
summary: >-
  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 aut…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
  - CWE-401
  - CWE-770
vendor: pyload
product: pyload
affected:
  - pyload < 0.5.0b3.dev101
published: '2026-09-15'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T13:42:49.090'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-48987'
references:
  - url: >-
      https://github.com/pyload/pyload/commit/1b12dc7f348db8c144e0f39215680415e90ca4d2
    label: security-advisories@github.com
  - url: 'https://github.com/pyload/pyload/security/advisories/GHSA-c2f9-4mc8-j656'
    label: security-advisories@github.com
  - url: 'https://github.com/pyload/pyload/security/advisories/GHSA-c2f9-4mc8-j656'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/advisories/GHSA-c2f9-4mc8-j656'
tags:
  - nvd
  - cve.org
  - exploit-available
  - ghsa
  - pip
aliases:
  - GHSA-c2f9-4mc8-j656
ecosystem: pip
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-15T14:55:14.936889Z'
ingestedAt: '2026-07-09T13:51:05.213Z'
epss: 0.00301
epssPercentile: 0.22982
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-48987)

Affected packages:

- `pyload-ng <= 0.5.0b3.dev100`

Source: https://github.com/advisories/GHSA-c2f9-4mc8-j656