usn-8344-1
Vulnerability from osv_ubuntu
Published
2026-05-28 19:46
Modified
2026-05-29 23:03
Summary
python-pip vulnerabilities
Details

It was discovered that pip incorrectly handled TLS certificate verification in session connections. If a session was first used with certificate verification disabled, subsequent requests to the same host would also skip verification regardless of the session's current settings. A remote attacker could possibly use this issue to perform a machine-in-the-middle attack and expose sensitive information. (CVE-2024-35195)

It was discovered that pip's bundled urllib3 library did not limit the number of decompression steps when processing HTTP responses. A remote attacker could possibly use this issue to cause pip to consume excessive resources, leading to a denial of service. (CVE-2025-66418)

It was discovered that pip's bundled urllib3 library improperly handled streaming decompression of highly compressed data. A remote attacker could possibly use this issue to cause pip to consume excessive resources, leading to a denial of service. (CVE-2025-66471)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2024-35195",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-66418",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "python3-pip",
            "binary_version": "22.0.2+dfsg-1ubuntu0.7+esm1"
          },
          {
            "binary_name": "python3-pip-whl",
            "binary_version": "22.0.2+dfsg-1ubuntu0.7+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "python-pip",
        "purl": "pkg:deb/ubuntu/python-pip@22.0.2+dfsg-1ubuntu0.7+esm1?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "22.0.2+dfsg-1ubuntu0.7+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "20.3.4-4",
        "21.3.1+dfsg-3",
        "22.0.2+dfsg-1",
        "22.0.2+dfsg-1ubuntu0.1",
        "22.0.2+dfsg-1ubuntu0.2",
        "22.0.2+dfsg-1ubuntu0.3",
        "22.0.2+dfsg-1ubuntu0.4",
        "22.0.2+dfsg-1ubuntu0.5",
        "22.0.2+dfsg-1ubuntu0.6",
        "22.0.2+dfsg-1ubuntu0.7"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2024-35195",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-66418",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "python3-pip",
            "binary_version": "24.0+dfsg-1ubuntu1.3+esm1"
          },
          {
            "binary_name": "python3-pip-whl",
            "binary_version": "24.0+dfsg-1ubuntu1.3+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "python-pip",
        "purl": "pkg:deb/ubuntu/python-pip@24.0+dfsg-1ubuntu1.3+esm1?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "24.0+dfsg-1ubuntu1.3+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "23.2+dfsg-1",
        "23.3+dfsg-1",
        "24.0+dfsg-1",
        "24.0+dfsg-1ubuntu1",
        "24.0+dfsg-1ubuntu1.1",
        "24.0+dfsg-1ubuntu1.2",
        "24.0+dfsg-1ubuntu1.3"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [],
          "ecosystem": "Ubuntu:Pro:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "python3-pip",
            "binary_version": "25.1.1+dfsg-1ubuntu2+esm1"
          },
          {
            "binary_name": "python3-pip-whl",
            "binary_version": "25.1.1+dfsg-1ubuntu2+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:26.04:LTS",
        "name": "python-pip",
        "purl": "pkg:deb/ubuntu/python-pip@25.1.1+dfsg-1ubuntu2+esm1?arch=source\u0026distro=esm-apps/resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "25.1.1+dfsg-1ubuntu2+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "25.1.1+dfsg-1ubuntu2"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that pip incorrectly handled TLS certificate\nverification in session connections. If a session was first used with\ncertificate verification disabled, subsequent requests to the same host\nwould also skip verification regardless of the session\u0027s current settings.\nA remote attacker could possibly use this issue to perform a machine-in-the-middle\nattack and expose sensitive information. (CVE-2024-35195)\n\nIt was discovered that pip\u0027s bundled urllib3 library did not limit the\nnumber of decompression steps when processing HTTP responses. A remote\nattacker could possibly use this issue to cause pip to consume excessive resources,\nleading to a denial of service. (CVE-2025-66418)\n\nIt was discovered that pip\u0027s bundled urllib3 library improperly\nhandled streaming decompression of highly compressed data. A remote\nattacker could possibly use this issue to cause pip to consume excessive resources,\nleading to a denial of service. (CVE-2025-66471)",
  "id": "USN-8344-1",
  "modified": "2026-05-29T23:03:39Z",
  "published": "2026-05-28T19:46:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8344-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-35195"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-66418"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-66471"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "python-pip vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2024-35195",
    "UBUNTU-CVE-2025-66418",
    "UBUNTU-CVE-2025-66471"
  ]
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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