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CVE-2026-44431 · cross-distro fix matrix

CVE-2026-44431: It was discovered that urllib3 incorrectly handled cross-origin redirects

Affects 4 Linux releases across 8 (distro × package) combinations. First disclosed: 2026-05-13.

CVSS v3:MEDIUM · 5.3(NVD-published)

Fix per ecosystem

Each block below is a distro release where CVE-2026-44431 has a known fix. Run the listed command on that distro to remediate.

Ubuntu jammy

Source: Ubuntu USN

  • python-urllib3→ fixed in1.26.5-1~exp1ubuntu0.7USN-8379-1
    sudo apt-get install --only-upgrade -y python-urllib3
  • python3-urllib3→ fixed in1.26.5-1~exp1ubuntu0.7USN-8379-1
    sudo apt-get install --only-upgrade -y python3-urllib3

Ubuntu noble

Source: Ubuntu USN

  • python-urllib3→ fixed in2.0.7-1ubuntu0.7USN-8379-1
    sudo apt-get install --only-upgrade -y python-urllib3
  • python3-urllib3→ fixed in2.0.7-1ubuntu0.7USN-8379-1
    sudo apt-get install --only-upgrade -y python3-urllib3

Ubuntu questing

Source: Ubuntu USN

  • python-urllib3→ fixed in2.3.0-3ubuntu0.6USN-8379-1
    sudo apt-get install --only-upgrade -y python-urllib3
  • python3-urllib3→ fixed in2.3.0-3ubuntu0.6USN-8379-1
    sudo apt-get install --only-upgrade -y python3-urllib3

Ubuntu resolute

Source: Ubuntu USN

  • python-urllib3→ fixed in2.6.3-1ubuntu1.1USN-8379-1
    sudo apt-get install --only-upgrade -y python-urllib3
  • python3-urllib3→ fixed in2.6.3-1ubuntu1.1USN-8379-1
    sudo apt-get install --only-upgrade -y python3-urllib3
Are YOU affected by CVE-2026-44431?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

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