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CVE-2024-24762— python-multipart vulnerable to content-type header Regular expression Denial of Service

Quick assessment

Affected
Kludex python-multipart
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Python是Python基金会的一套开源的、面向对象的程序设计语言。该语言具有可扩展、支持模块和包、支持多种平台等特点。express是expressjs开源的一个 Node.js 的快速、无限制、极简的 web 框架。 FastAPI 0.109.0版本及之前版本存在资源管理错误漏洞，该漏洞源于所依赖的软件包 python-multipart 会消耗 CPU 资源并在保持主事件循环的同时无限期地停止。

CVSS 7.5 · High EPSS 1.52% · P74

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2024-24762

Vulnerability Information
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Vulnerability Title
python-multipart vulnerable to content-type header Regular expression Denial of Service
Source: CVE Program / CVE List V5
Vulnerability Description
`python-multipart` is a streaming multipart parser for Python. When using form data, `python-multipart` uses a Regular Expression to parse the HTTP `Content-Type` header, including options. An attacker could send a custom-made `Content-Type` option that is very difficult for the RegEx to process, consuming CPU resources and stalling indefinitely (minutes or more) while holding the main event loop. This means that process can't handle any more requests, leading to regular expression denial of service. This vulnerability has been patched in version 0.0.7.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/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
Vulnerability Title
FastAPI 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Python是Python基金会的一套开源的、面向对象的程序设计语言。该语言具有可扩展、支持模块和包、支持多种平台等特点。express是expressjs开源的一个 Node.js 的快速、无限制、极简的 web 框架。 FastAPI 0.109.0版本及之前版本存在资源管理错误漏洞，该漏洞源于所依赖的软件包 python-multipart 会消耗 CPU 资源并在保持主事件循环的同时无限期地停止。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Kludex python-multipart 0 ~ 0.0.7 -
tiangolo fastapi 0 ~ 0.109.1 -
encode starlette 0 ~ 0.36.2 -

II. Public POCs for CVE-2024-24762

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 65898 chars
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III. Intelligence Information for CVE-2024-24762

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Patches & Fixes for CVE-2024-24762 (2)

Vendor Advisories for CVE-2024-24762 (3)

Other References for CVE-2024-24762 (2)

IV. Related Vulnerabilities

Same product: python-multipart
Same vendor: Kludex
Same weakness: CWE-400

V. Comments for CVE-2024-24762

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