usn-8379-1
Vulnerability from osv_ubuntu
Published
2026-06-03 13:50
Modified
2026-06-30 15:55
Summary
python-urllib3 vulnerabilities
Details

It was discovered that urllib3 incorrectly handled cross-origin redirects in ProxyManager. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2026-44431)

It was discovered that urllib3 incorrectly handled decompression of specially crafted responses. A remote attacker could possibly use this issue to cause urllib3 to consume resources, leading to a denial of service. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-44432)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-44431",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python3-urllib3",
            "binary_version": "1.26.5-1~exp1ubuntu0.7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "python-urllib3",
        "purl": "pkg:deb/ubuntu/python-urllib3@1.26.5-1~exp1ubuntu0.7?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.26.5-1~exp1ubuntu0.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.26.5-1~exp1",
        "1.26.5-1~exp1ubuntu0.1",
        "1.26.5-1~exp1ubuntu0.2",
        "1.26.5-1~exp1ubuntu0.3",
        "1.26.5-1~exp1ubuntu0.4",
        "1.26.5-1~exp1ubuntu0.5",
        "1.26.5-1~exp1ubuntu0.6"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-44431",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python3-urllib3",
            "binary_version": "2.0.7-1ubuntu0.7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "python-urllib3",
        "purl": "pkg:deb/ubuntu/python-urllib3@2.0.7-1ubuntu0.7?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.7-1ubuntu0.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.26.16-1",
        "1.26.18-1",
        "2.0.7-1",
        "2.0.7-1ubuntu0.1",
        "2.0.7-1ubuntu0.2",
        "2.0.7-1ubuntu0.3",
        "2.0.7-1ubuntu0.4",
        "2.0.7-1ubuntu0.5",
        "2.0.7-1ubuntu0.6"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-44431",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:25.10"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python3-urllib3",
            "binary_version": "2.3.0-3ubuntu0.6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "python-urllib3",
        "purl": "pkg:deb/ubuntu/python-urllib3@2.3.0-3ubuntu0.6?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.3.0-3ubuntu0.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.3.0-2",
        "2.3.0-2ubuntu1",
        "2.3.0-3",
        "2.3.0-3ubuntu0.1",
        "2.3.0-3ubuntu0.2",
        "2.3.0-3ubuntu0.3",
        "2.3.0-3ubuntu0.4"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-44431",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-44432",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python3-urllib3",
            "binary_version": "2.6.3-1ubuntu1.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "python-urllib3",
        "purl": "pkg:deb/ubuntu/python-urllib3@2.6.3-1ubuntu1.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.6.3-1ubuntu1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.3.0-3",
        "2.5.0-1",
        "2.5.0-1ubuntu1",
        "2.5.0-1ubuntu2",
        "2.6.3-1ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that urllib3 incorrectly handled cross-origin redirects\nin ProxyManager. A remote attacker could possibly use this issue to obtain\nsensitive information. (CVE-2026-44431)\n\nIt was discovered that urllib3 incorrectly handled decompression of\nspecially crafted responses. A remote attacker could possibly use this\nissue to cause urllib3 to consume resources, leading to a denial of\nservice. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-44432)",
  "id": "USN-8379-1",
  "modified": "2026-06-30T15:55:20Z",
  "published": "2026-06-03T13:50:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8379-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-44431"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-44432"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "python-urllib3 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-44431",
    "UBUNTU-CVE-2026-44432"
  ]
}



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