Red Hat Security Advisory: python-urllib3 security update

Fixed packages 1

Vulnerabilities 1

• High 8.9
  CVE-2025-66471

  urllib3 Streaming API improperly handles highly compressed data

  urllib3 is a user-friendly HTTP client library for Python. Starting in version 1.0 and prior to 2.6.0, the Streaming API improperly handles highly compressed data. urllib3's streaming API is designed for the efficient handling of large HTTP responses by readi…

  urllib3 urllib3 open-webui katib-suggestion-hyperopt Debian Ubuntu Azure Linux Alpine Wolfi PyPI
  Dec 5, 2025

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2419467
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_9031.json
• report
  https://access.redhat.com/security/cve/CVE-2025-66471
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-66471
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-66471
• article
  https://github.com/urllib3/urllib3/commit/c19571de34c47de3a766541b041637ba5f716ed7
• article
  https://github.com/urllib3/urllib3/security/advisories/GHSA-2xpw-w6gg-jr37