CVE-2025-6176
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductBrotli
PublishedOct 31, 2025
First seenOct 31, 2025
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- brotli1.2.0 or later
- scrapy2.13.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| brotliPyPI | v < 1.2.0 | 1.2.0 |
| scrapyPyPI | v < 2.13.4 | 2.13.4 |
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