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CVE-2026-48987— pyLoad: Unbounded Memory Growth Leading to DoS and Potential DDoS in EventManager

Quick assessment

Affected
pyload pyload
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

pyLoad 是一个用 Python 编写的免费开源下载管理器。在版本 0.5.0b3.dev101 之前，位于 中的 会为每个提交到已认证的 API 端点的唯一 UUID 向 列表追加一个 对象，但 方法并未调用可用的 方法来移除不活动的客户端。这意味着已认证用户可以反复提交唯一的 UUID 值，导致被保留的 对象和进程内存持续增长，即使在请求停止后内存也不会释放。由此产生的内存耗尽可能触发操作系统的内存不足终止（OOM）使 pyLoad 进程被强制结束，或导致主机整体不稳定及服务不可用（Denial of Se

CVSS 6.5 · Medium

Possible ATT&CK Techniques 2 AI

T1480 · Execution Guardrails T1298
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I. Basic Information for CVE-2026-48987

Vulnerability Information
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Vulnerability Title
pyLoad: Unbounded Memory Growth Leading to DoS and Potential DDoS in EventManager
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
pyload pyload < 0.5.0b3.dev101 -

II. Public POCs for CVE-2026-48987

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III. Intelligence Information for CVE-2026-48987

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Patches & Fixes for CVE-2026-48987 (1)

Vendor Advisories for CVE-2026-48987 (1)

IV. Related Vulnerabilities

Same product: pyload
Same vendor: pyload
Same weakness: CWE-400

V. Comments for CVE-2026-48987

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