CVE-2025-6176

Brotli decompression bomb DoS in scrapy/scrapy

Published: Oct 31, 2025Updated: Nov 4, 2025 Sources: CVE List NVD GHSA BDUCWE-400

7.5HIGH

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:HAvailability

High

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Weaknesses

CWE-400

Affected Products

package-ecosystem

commercialaka scrapy

ScrapyOn-prem

OSS Libraries / web-framework

АО «СберТех»

commercial·RUaka сбертех, ao sbertech

Platform V SberLinux OS ServerOn-premOS

Operating Systems / linux-distro

scrapy

oss-project·USaka scrapy/scrapy

scrapy/scrapyLibrary

OSS Libraries / generic-library

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Impact

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References

https://huntr.com/bounties/2c26a886-5984-47ee-a421-0d5fe1344eb0

huntr.com

https://dbugs.ptsecurity.com/vulnerability/PT-2025-44569

dbugs.ptsecurity.com

https://huntr.com/bounties/2c26a886-5984-47ee-a421-0d5fe1344eb0

huntr.com

and 9 more references View all →

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