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CVE-2026-48484— pyLoad: Lack of Input Size Validation Leads to Denial of Service (DoS) and Process Termination

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 是一个使用 Python 编写的免费开源下载管理器。在版本 0.5.0b3.dev101 之前， 中的 API 函数在处理 上传时，会通过 将整个上传文件的内容读入内存，且这一操作发生在将数据传递给底层处理函数之前。由于此时未设置文件大小限制，上传大文件可能导致服务器可用内存耗尽，进而引发进程终止。版本 0.5.0b3.dev101 包含了修复该问题的补丁。

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
pyload pyload < 0.5.0b3.dev101 affected
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I. Basic Information for CVE-2026-48484

Vulnerability Information
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Vulnerability Title
pyLoad: Lack of Input Size Validation Leads to Denial of Service (DoS) and Process Termination
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, the API `rpc` function in `api_blueprint.py` handles `multipart/form-data` uploads by reading the whole content of the uploaded file into memory with `file.read()`. This occurs before the data is sent to the underlying function. Since there is no size limit set at this point, a large file upload can exhaust the server's available memory which led to process termination. Version 0.5.0b3.dev101 contains a patch.
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
输入验证不恰当
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-2026-48484

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III. Intelligence Information for CVE-2026-48484

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Other References for CVE-2026-48484 (3)

IV. Related Vulnerabilities

Same product: pyload
Same vendor: pyload
Same weakness: CWE-20

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