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OpenAdvisories
High ALSA-2026:0845 1 CVE

Important: brotli security update

Published Jan 20, 2026 · Updated Oct 29, 2026

Summary

Brotli is a generic-purpose lossless compression algorithm that compresses data using a combination of a modern variant of the LZ77 algorithm, Huffman coding and 2nd order context modeling, with a compression ratio comparable to the best currently available general-purpose compression methods. It is similar in speed with deflate but offers more dense compression.

Security Fix(es):

* Scrapy: python-scrapy: brotli: Python brotli decompression bomb DoS (CVE-2025-6176)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Fixed packages 4

ReleasePackageFixed in
AlmaLinux · 10 brotli 1.1.0-7.el10_1
AlmaLinux · 10 brotli-devel 1.1.0-7.el10_1
AlmaLinux · 10 libbrotli 1.1.0-7.el10_1
AlmaLinux · 10 python3-brotli 1.1.0-7.el10_1

Vulnerabilities 1

  • High 7.5

    Brotli decompression bomb DoS in scrapy/scrapy

    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 cra…

References

  • report
    https://access.redhat.com/security/cve/CVE-2025-6176
  • report
    https://bugzilla.redhat.com/2408762
  • advisory
    https://errata.almalinux.org/10/ALSA-2026-0845.html