CVE-2025-6176— Brotli decompression bomb DoS in scrapy/scrapy
Quick assessment
Affected
scrapy scrapy/scrapy
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.
Scrapy是Scrapy开源的一个用Python编写的自由且开源的网络爬虫框架。 Scrapy 2.13.2及之前版本存在资源管理错误漏洞，该漏洞源于brotli解压实现存在缺陷，可能导致拒绝服务攻击。
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I. Basic Information for CVE-2025-6176
Vulnerability Information
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Vulnerability Title
Brotli decompression bomb DoS in scrapy/scrapy
Source: CVE Program / CVE List V5
Vulnerability Description
Scrapy versions up to 2.13.2 are vulnerable to a denial of service (DoS) attack due to a flaw in its brotli decompression implementation. The protection mechanism against decompression bombs fails to mitigate the brotli variant, allowing remote servers to crash clients with less than 80GB of available memory. This occurs because brotli can achieve extremely high compression ratios for zero-filled data, leading to excessive memory consumption during decompression.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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
Scrapy 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Scrapy是Scrapy开源的一个用Python编写的自由且开源的网络爬虫框架。 Scrapy 2.13.2及之前版本存在资源管理错误漏洞，该漏洞源于brotli解压实现存在缺陷，可能导致拒绝服务攻击。
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 |
|---|---|---|---|---|
| scrapy | scrapy/scrapy | unspecified ~ latest | - |
|
II. Public POCs for CVE-2025-6176
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2025-6176 (1)
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V. Comments for CVE-2025-6176
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