Scrapy is vulnerable to a denial of service (DoS) attack due to flaws in brotli decompression implementation
Scrapy versions up to 2.13.3 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. Mitigation for this vulnerability needs security enhancement added in brotli v1.2.0.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Python (PyPI) | brotli | < 1.2.0 | 1.2.0 |
| Python (PyPI) | scrapy | < 2.13.4 | 2.13.4 |
Referencias
- https://nvd.nist.gov/vuln/detail/CVE-2025-6176
- https://github.com/google/brotli/issues/1327
- https://github.com/google/brotli/issues/1375
- https://github.com/google/brotli/pull/1234
- https://github.com/scrapy/scrapy/pull/7134
- https://github.com/google/brotli/commit/67d78bc41db1a0d03f2e763497748f2f69946627
- https://github.com/scrapy/scrapy/commit/14737e91edc513967f516fc839cc9c8a4f8d91da
- https://github.com/google/brotli
- https://github.com/google/brotli/releases/tag/v1.2.0
- https://huntr.com/bounties/2c26a886-5984-47ee-a421-0d5fe1344eb0
- https://pypi.org/project/scrapy
- https://github.com/advisories/GHSA-2qfp-q593-8484
- https://pypi.org/project/brotli
- Vector CVSS
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Debilidad (CWE)
CWE-400- Plataforma
- Python (PyPI)
- Paquete
brotli, scrapy- Publicada
- 31.10.2025
- Actualizado
- 11.10.2026 15:17
Fuentes y licencias
OSV / GitHub Advisory Database - PYSEC-2026-1906 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - PYSEC-2026-2401 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-2qfp-q593-8484 - CC BY 4.0
Historial de vulnerabilidades: brotli
Todas las vulnerabilidades publicadas de este paquete (Python (PyPI)), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 2
- Primera → última
- 09.2020 10.2025
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Alta 1
- Media 1
Divulgaciones por año
- 2020: 1
- 2021: 0
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 1
- 2026: 0
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Scrapy is vulnerable to a denial of service (DoS) attack due to flaws in brotli decompression implementation esta entrada
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