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ubuntu-cve-2026-17106
Vulnerability from osv_ubuntu
Published
2026-08-18 19:16
Modified
2026-09-02 16:12
Summary
Details

The tar extraction routines in moby/go-archive (Unpack, UnpackLayer, Untar/UntarUncompressed, and the ApplyLayer helpers) do not confine filesystem operations to the destination directory. The extractor decides where each archive entry lands using lexical string checks and then performs the filesystem operation on a path that is resolved by the OS, so links introduced by the archive can be followed out of the destination directory. An attacker who controls the contents of an archive can create or overwrite files at arbitrary paths writable by the extracting process.


{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "docker.io",
            "binary_version": "18.09.7-0ubuntu1~16.04.9+esm2"
          },
          {
            "binary_name": "golang-docker-dev",
            "binary_version": "18.09.7-0ubuntu1~16.04.9+esm2"
          },
          {
            "binary_name": "golang-github-docker-docker-dev",
            "binary_version": "18.09.7-0ubuntu1~16.04.9+esm2"
          },
          {
            "binary_name": "vim-syntax-docker",
            "binary_version": "18.09.7-0ubuntu1~16.04.9+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "docker.io",
        "purl": "pkg:deb/ubuntu/docker.io@18.09.7-0ubuntu1~16.04.9+esm2?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.6.2~dfsg1-1ubuntu4",
        "1.10.2-0ubuntu3",
        "1.10.2-0ubuntu4",
        "1.10.3-0ubuntu1",
        "1.10.3-0ubuntu4",
        "1.10.3-0ubuntu5",
        "1.10.3-0ubuntu6",
        "1.11.2-0ubuntu5~16.04",
        "1.12.1-0ubuntu13~16.04.1",
        "1.12.3-0ubuntu4~16.04.2",
        "1.12.6-0ubuntu1~16.04.1",
        "1.13.1-0ubuntu1~16.04.2",
        "17.03.2-0ubuntu2~16.04.1",
        "18.06.1-0ubuntu1~16.04.2",
        "18.06.1-0ubuntu1.2~16.04.1",
        "18.09.2-0ubuntu1~16.04.1",
        "18.09.5-0ubuntu1~16.04.2",
        "18.09.7-0ubuntu1~16.04.1",
        "18.09.7-0ubuntu1~16.04.4",
        "18.09.7-0ubuntu1~16.04.5",
        "18.09.7-0ubuntu1~16.04.6",
        "18.09.7-0ubuntu1~16.04.7",
        "18.09.7-0ubuntu1~16.04.9+esm1",
        "18.09.7-0ubuntu1~16.04.9+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "docker.io",
            "binary_version": "20.10.21-0ubuntu1~18.04.3+esm3"
          },
          {
            "binary_name": "golang-docker-dev",
            "binary_version": "20.10.21-0ubuntu1~18.04.3+esm3"
          },
          {
            "binary_name": "golang-github-docker-docker-dev",
            "binary_version": "20.10.21-0ubuntu1~18.04.3+esm3"
          },
          {
            "binary_name": "vim-syntax-docker",
            "binary_version": "20.10.21-0ubuntu1~18.04.3+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "docker.io",
        "purl": "pkg:deb/ubuntu/docker.io@20.10.21-0ubuntu1~18.04.3+esm3?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.13.1-0ubuntu6",
        "17.03.2-0ubuntu1",
        "17.03.2-0ubuntu3",
        "17.03.2-0ubuntu5",
        "17.12.1-0ubuntu1",
        "18.06.1-0ubuntu1~18.04.1",
        "18.06.1-0ubuntu1.2~18.04.1",
        "18.09.2-0ubuntu1~18.04.1",
        "18.09.5-0ubuntu1~18.04.2",
        "18.09.7-0ubuntu1~18.04.1",
        "18.09.7-0ubuntu1~18.04.3",
        "18.09.7-0ubuntu1~18.04.4",
        "19.03.6-0ubuntu1~18.04.1",
        "19.03.6-0ubuntu1~18.04.2",
        "19.03.6-0ubuntu1~18.04.3",
        "20.10.2-0ubuntu1~18.04.2",
        "20.10.2-0ubuntu1~18.04.3",
        "20.10.7-0ubuntu1~18.04.1",
        "20.10.7-0ubuntu1~18.04.2",
        "20.10.7-0ubuntu5~18.04.2",
        "20.10.7-0ubuntu5~18.04.3",
        "20.10.12-0ubuntu2~18.04.1",
        "20.10.21-0ubuntu1~18.04.2",
        "20.10.21-0ubuntu1~18.04.3",
        "20.10.21-0ubuntu1~18.04.3+esm1",
        "20.10.21-0ubuntu1~18.04.3+esm2",
        "20.10.21-0ubuntu1~18.04.3+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-docker-dev",
            "binary_version": "20.10.21-0ubuntu1~20.04.6+esm2"
          },
          {
            "binary_name": "golang-github-docker-docker-dev",
            "binary_version": "20.10.21-0ubuntu1~20.04.6+esm2"
          },
          {
            "binary_name": "vim-syntax-docker",
            "binary_version": "20.10.21-0ubuntu1~20.04.6+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "docker.io",
        "purl": "pkg:deb/ubuntu/docker.io@20.10.21-0ubuntu1~20.04.6+esm2?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "19.03.2-0ubuntu1",
        "19.03.6-0ubuntu1",
        "19.03.8-0ubuntu1",
        "19.03.8-0ubuntu1.20.04",
        "19.03.8-0ubuntu1.20.04.1",
        "19.03.8-0ubuntu1.20.04.2",
        "20.10.2-0ubuntu1~20.04.2",
        "20.10.2-0ubuntu1~20.04.3",
        "20.10.7-0ubuntu1~20.04.1",
        "20.10.7-0ubuntu1~20.04.2",
        "20.10.7-0ubuntu5~20.04.1",
        "20.10.7-0ubuntu5~20.04.2",
        "20.10.12-0ubuntu2~20.04.1",
        "20.10.21-0ubuntu1~20.04.1",
        "20.10.21-0ubuntu1~20.04.2",
        "20.10.21-0ubuntu1~20.04.4",
        "20.10.21-0ubuntu1~20.04.5",
        "20.10.21-0ubuntu1~20.04.6",
        "20.10.21-0ubuntu1~20.04.6+esm1",
        "20.10.21-0ubuntu1~20.04.6+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "docker.io",
            "binary_version": "26.1.3-0ubuntu1~20.04.1+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "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"
            }
          ],
          "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",
        "26.1.3-0ubuntu1~20.04.1+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-docker-dev",
            "binary_version": "20.10.21-0ubuntu1~22.04.8+esm1"
          },
          {
            "binary_name": "golang-github-docker-docker-dev",
            "binary_version": "20.10.21-0ubuntu1~22.04.8+esm1"
          },
          {
            "binary_name": "vim-syntax-docker",
            "binary_version": "20.10.21-0ubuntu1~22.04.8+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "docker.io",
        "purl": "pkg:deb/ubuntu/docker.io@20.10.21-0ubuntu1~22.04.8+esm1?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "20.10.7-0ubuntu5",
        "20.10.7-0ubuntu7",
        "20.10.12-0ubuntu1",
        "20.10.12-0ubuntu2",
        "20.10.12-0ubuntu3",
        "20.10.12-0ubuntu3+gke1.24.1",
        "20.10.12-0ubuntu4",
        "20.10.21-0ubuntu1~22.04.2",
        "20.10.21-0ubuntu1~22.04.3",
        "20.10.21-0ubuntu1~22.04.5",
        "20.10.21-0ubuntu1~22.04.6",
        "20.10.21-0ubuntu1~22.04.7",
        "20.10.21-0ubuntu1~22.04.7+esm1",
        "20.10.21-0ubuntu1~22.04.7+esm2",
        "20.10.21-0ubuntu1~22.04.8",
        "20.10.21-0ubuntu1~22.04.8+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "docker.io",
            "binary_version": "29.1.3-0ubuntu3~22.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "docker.io-app",
        "purl": "pkg:deb/ubuntu/docker.io-app@29.1.3-0ubuntu3~22.04.2?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "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",
        "26.1.3-0ubuntu1~22.04.1+esm1",
        "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",
        "29.1.3-0ubuntu3~22.04.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-docker-docker-dev",
            "binary_version": "20.10.25+dfsg1-2ubuntu1.24.04.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "docker.io",
        "purl": "pkg:deb/ubuntu/docker.io@20.10.25+dfsg1-2ubuntu1.24.04.1+esm1?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "20.10.24+dfsg1-1ubuntu2",
        "20.10.25+dfsg1-2ubuntu1",
        "20.10.25+dfsg1-2ubuntu1+esm1",
        "20.10.25+dfsg1-2ubuntu1+esm2",
        "20.10.25+dfsg1-2ubuntu1.24.04.1",
        "20.10.25+dfsg1-2ubuntu1.24.04.1+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "docker.io",
            "binary_version": "29.1.3-0ubuntu3~24.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "docker.io-app",
        "purl": "pkg:deb/ubuntu/docker.io-app@29.1.3-0ubuntu3~24.04.2?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "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",
        "26.1.3-0ubuntu1~24.04.1+esm1",
        "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",
        "29.1.3-0ubuntu3~24.04.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-docker-docker-dev",
            "binary_version": "27.5.1+dfsg4-2ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "docker.io",
        "purl": "pkg:deb/ubuntu/docker.io@27.5.1+dfsg4-2ubuntu1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "26.1.5+dfsg1-9ubuntu1",
        "27.5.1+dfsg4-1ubuntu1",
        "27.5.1+dfsg4-2ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "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"
            }
          ],
          "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",
        "29.1.3-0ubuntu4.1"
      ]
    }
  ],
  "aliases": [],
  "details": "The tar extraction routines in moby/go-archive (Unpack, UnpackLayer, Untar/UntarUncompressed, and the ApplyLayer helpers) do not confine filesystem operations to the destination directory. The extractor decides where each archive entry lands using lexical string checks and then performs the filesystem operation on a path that is resolved by the OS, so links introduced by the archive can be followed out of the destination directory. An attacker who controls the contents of an archive can create or overwrite files at arbitrary paths writable by the extracting process.",
  "id": "UBUNTU-CVE-2026-17106",
  "modified": "2026-09-02T16:12:06Z",
  "published": "2026-08-18T19:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-17106"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-17106"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-17106"
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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