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CVE-2025-6176

CVE-2025-6176 · Brotli decompression bomb DoS in scrapy/scrapy

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 7.5 · High · EPSS 0.5% · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • scrapy/scrapy

    Versions
    • ≥ unspecified, ≤ latest: Affected (custom)

    No fix published

  • python-scrapy Debian:12

    Versions
    • 2.10.0-1
    • 2.11.0-1
    • 2.11.0-2
    • 2.11.1-1
    • 2.11.1-2
    • 2.11.2-1
    • 2.11.2-2
    • 2.11.2-3
    • 2.12.0-1
    • 2.12.0-2
    • 2.13.1-1~exp1
    • 2.13.3-1
    • 2.13.3-1~exp1
    • 2.13.4-1
    • 2.13.4-2
    • 2.14.0-1
    • 2.14.1-1
    • 2.14.2-1
    • 2.15.1-1
    • 2.16.0-1
    • 2.16.0-2
    • 2.17.0-1
    • 2.18.0-1
    • 2.8.0-2
    • 2.9.0-1
    • 2.9.0-1~exp1
    • 2.9.0-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-scrapy Debian:13

    Versions
    • 2.12.0-2
    • 2.13.1-1~exp1
    • 2.13.3-1
    • 2.13.3-1~exp1
    • 2.13.4-1
    • 2.13.4-2
    • 2.14.0-1
    • 2.14.1-1
    • 2.14.2-1
    • 2.15.1-1
    • 2.16.0-1
    • 2.16.0-2
    • 2.17.0-1
    • 2.18.0-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-scrapy Debian:14

    Versions
    • 2.12.0-2
    • 2.13.1-1~exp1
    • 2.13.3-1
    • 2.13.3-1~exp1
    Affected ranges
    • ECOSYSTEM: < 2.13.4-1

    Update to 2.13.4-1

  • brotli PyPI

    Versions
    • 0.5.2
    • 0.6.0
    • 1.0.1
    • 1.0.4
    • 1.0.6
    • 1.0.7
    • 1.0.8
    • 1.0.9
    • 1.1.0
    Affected ranges
    • ECOSYSTEM: < 1.2.0

    Update to 1.2.0

  • scrapy PyPI

    Versions
    • 0.10.4.2364
    • 0.12.0.2550
    • 0.14.1
    • 0.14.2
    • 0.14.3
    • 0.14.4
    • 0.16.0
    • 0.16.1
    • 0.16.2
    • 0.16.3
    • 0.16.4
    • 0.16.5
    • 0.18.0
    • 0.18.1
    • 0.18.2
    • 0.18.3
    • 0.18.4
    • 0.20.0
    • 0.20.1
    • 0.20.2
    • 0.22.0
    • 0.22.1
    • 0.22.2
    • 0.24.0
    • 0.24.1
    • 0.24.2
    • 0.24.3
    • 0.24.4
    • 0.24.5
    • 0.24.6
    • 0.7
    • 0.8
    • 0.9
    • 1.0.0
    • 1.0.0rc1
    • 1.0.0rc2
    • 1.0.0rc3
    • 1.0.1
    • 1.0.2
    • 1.0.3
    • 1.0.4
    • 1.0.5
    • 1.0.6
    • 1.0.7
    • 1.1.0
    • 1.1.0rc1
    • 1.1.0rc2
    • 1.1.0rc3
    • 1.1.0rc4
    • 1.1.1
    • 1.1.2
    • 1.1.3
    • 1.1.4
    • 1.2.0
    • 1.2.1
    • 1.2.2
    • 1.2.3
    • 1.3.0
    • 1.3.1
    • 1.3.2
    • 1.3.3
    • 1.4.0
    • 1.5.0
    • 1.5.1
    • 1.5.2
    • 1.6.0
    • 1.7.0
    • 1.7.1
    • 1.7.2
    • 1.7.3
    • 1.7.4
    • 1.8.0
    • 1.8.1
    • 1.8.2
    • 1.8.3
    • 1.8.4
    • 2.0.0
    • 2.0.1
    • 2.1.0
    • 2.10.0
    • 2.10.1
    • 2.11.0
    • 2.11.1
    • 2.11.2
    • 2.12.0
    • 2.13.0
    • 2.13.1
    • 2.13.2
    • 2.13.3
    • 2.2.0
    • 2.2.1
    • 2.3.0
    • 2.4.0
    • 2.4.1
    • 2.5.0
    • 2.5.1
    • 2.6.0
    • 2.6.1
    • 2.6.2
    • 2.6.3
    • 2.7.0
    • 2.7.1
    • 2.8.0
    • 2.9.0
    Affected ranges
    • ECOSYSTEM: < 2.13.4

    Update to 2.13.4

  • python-scrapy Ubuntu:16.04:LTS

    Versions
    • 1.0.0-1
    • 1.0.3-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-scrapy Ubuntu:Pro:18.04:LTS

    Versions
    • 1.3.0-1~exp2
    • 1.4.0-1
    • 1.5.0-1
    • 1.5.0-1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-scrapy Ubuntu:Pro:20.04:LTS

    Versions
    • 1.7.3-1
    • 1.7.3-1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-scrapy Ubuntu:Pro:22.04:LTS

    Versions
    • 2.4.1-2
    • 2.5.1-2
    • 2.5.1-2ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-scrapy Ubuntu:Pro:24.04:LTS

    Versions
    • 2.10.0-1
    • 2.11.0-1
    • 2.11.0-2
    • 2.11.1-1
    • 2.11.1-1ubuntu0.1~esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-scrapy Ubuntu:25.10

    Versions
    • 2.12.0-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-scrapy Ubuntu:26.10

    Versions
    • 2.14.1-1
    • 2.17.0-1
    • 2.18.0-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-scrapy Ubuntu:26.04:LTS

    Versions
    • 2.12.0-2
    • 2.14.0-1
    • 2.14.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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