CVSS 3.0
7.5 highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2025-6176
High (7.5). EPSS 0.5% chance of exploitation in the next 30 days. Fixed in brotli 1.2.0.
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.
Severity
- EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 45% of CVEs (scores of 2026-10-31)
- CWE
- CWE-400
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-2qfp-q593-8484 | PyPI | brotli | <1.2.0 | 1.2.0 |
| GHSA-2qfp-q593-8484 | PyPI | scrapy | <2.13.4 | 2.13.4 |
| PYSEC-2026-1906 | PyPI | scrapy | <2.13.4 | 2.13.4 |
| PYSEC-2026-2401 | PyPI | brotli | <1.2.0 | 1.2.0 |