USN-8230-1 (UBUNTU-CVE-2026-33747)

Vulnerability from osv_ubuntu – Published: 2026-05-06 03:28 – Updated: 2026-05-20 14:48 – Source website
VLAI
Summary
docker.io-app vulnerabilities
Details

It was discovered that BuildKit, contained within Docker, incorrectly handled file path validation when processing frontend API messages. An attacker could possibly use this issue to write files outside of the intended state directory. (CVE-2026-33747)

It was discovered that BuildKit, contained within Docker, incorrectly validated the subdir component of Git URL fragments. An attacker could possibly use this issue to access files outside of the checked-out repository root. (CVE-2026-33748)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-33747",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-33748",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:L/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:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "docker.io",
            "binary_version": "26.1.3-0ubuntu1~20.04.1+esm2"
          }
        ]
      },
      "package": {
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        "name": "docker.io-app",
        "purl": "pkg:deb/ubuntu/docker.io-app@26.1.3-0ubuntu1~20.04.1+esm2?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "26.1.3-0ubuntu1~20.04.1+esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "20.10.25-0ubuntu1~20.04.1",
        "20.10.25-0ubuntu1~20.04.2",
        "24.0.5-0ubuntu1~20.04.1",
        "24.0.7-0ubuntu2~20.04.1",
        "26.1.3-0ubuntu1~20.04.1",
        "26.1.3-0ubuntu1~20.04.1+esm1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-33747",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-33748",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:L/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:H/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": "docker.io",
            "binary_version": "29.1.3-0ubuntu3~22.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "docker.io-app",
        "purl": "pkg:deb/ubuntu/docker.io-app@29.1.3-0ubuntu3~22.04.2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "29.1.3-0ubuntu3~22.04.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "20.10.25-0ubuntu1~22.04.1",
        "20.10.25-0ubuntu1~22.04.2",
        "24.0.5-0ubuntu1~22.04.1",
        "24.0.7-0ubuntu2~22.04.1",
        "26.1.3-0ubuntu1~22.04.1",
        "27.5.1-0ubuntu3~22.04.1",
        "27.5.1-0ubuntu3~22.04.2",
        "28.2.2-0ubuntu1~22.04.1",
        "29.1.3-0ubuntu3~22.04.1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-33747",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-33748",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:L/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:H/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": "docker.io",
            "binary_version": "29.1.3-0ubuntu3~24.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "docker.io-app",
        "purl": "pkg:deb/ubuntu/docker.io-app@29.1.3-0ubuntu3~24.04.2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
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            },
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "24.0.5-0ubuntu1",
        "24.0.7-0ubuntu1",
        "24.0.7-0ubuntu2",
        "24.0.7-0ubuntu3",
        "24.0.7-0ubuntu4",
        "24.0.7-0ubuntu4.1",
        "26.1.3-0ubuntu1~24.04.1",
        "27.5.1-0ubuntu3~24.04.1",
        "27.5.1-0ubuntu3~24.04.2",
        "28.2.2-0ubuntu1~24.04.1",
        "29.1.3-0ubuntu3~24.04.1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-33747",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-33748",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:L/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:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "docker.io",
            "binary_version": "29.1.3-0ubuntu4.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "docker.io-app",
        "purl": "pkg:deb/ubuntu/docker.io-app@29.1.3-0ubuntu4.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "29.1.3-0ubuntu4.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "28.2.2-0ubuntu1",
        "29.1.2-0ubuntu1",
        "29.1.3-0ubuntu1",
        "29.1.3-0ubuntu2",
        "29.1.3-0ubuntu3",
        "29.1.3-0ubuntu4"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that BuildKit, contained within Docker, incorrectly\nhandled file path validation when processing frontend API messages. An\nattacker could possibly use this issue to write files outside of the\nintended state directory. (CVE-2026-33747)\n\nIt was discovered that BuildKit, contained within Docker, incorrectly\nvalidated the subdir component of Git URL fragments. An attacker could\npossibly use this issue to access files outside of the checked-out\nrepository root. (CVE-2026-33748)",
  "id": "USN-8230-1",
  "modified": "2026-05-20T14:48:19Z",
  "published": "2026-05-06T03:28:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8230-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-33747"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-33748"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "docker.io-app vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-33747",
    "UBUNTU-CVE-2026-33748"
  ]
}



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