ubuntu-cve-2026-5439
Vulnerability from osv_ubuntu
Published
2026-04-09 15:16
Modified
2026-05-20 15:24
Summary
Details

A memory exhaustion vulnerability exists in ZIP archive processing. Orthanc automatically extracts ZIP archives uploaded to certain endpoints and trusts metadata fields describing the uncompressed size of archived files. An attacker can craft a small ZIP archive containing a forged size value, causing the server to allocate extremely large buffers during extraction.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "orthanc",
            "binary_version": "1.0.0+dfsg-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "orthanc",
        "purl": "pkg:deb/ubuntu/orthanc@1.0.0+dfsg-1build1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.9.4+dfsg-1",
        "0.9.4+dfsg-2",
        "0.9.5+dfsg-1",
        "1.0.0+dfsg-1",
        "1.0.0+dfsg-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "orthanc",
            "binary_version": "1.3.1+dfsg-1build2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "orthanc",
        "purl": "pkg:deb/ubuntu/orthanc@1.3.1+dfsg-1build2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3.0+dfsg-1build1",
        "1.3.0+dfsg-1build2",
        "1.3.1+dfsg-1",
        "1.3.1+dfsg-1build1",
        "1.3.1+dfsg-1build2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "orthanc",
            "binary_version": "1.5.8+dfsg-2ubuntu6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "orthanc",
        "purl": "pkg:deb/ubuntu/orthanc@1.5.8+dfsg-2ubuntu6?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.5.7+dfsg-2",
        "1.5.8+dfsg-2",
        "1.5.8+dfsg-2ubuntu2",
        "1.5.8+dfsg-2ubuntu3",
        "1.5.8+dfsg-2ubuntu4",
        "1.5.8+dfsg-2ubuntu5",
        "1.5.8+dfsg-2ubuntu6"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "liborthancframework1",
            "binary_version": "1.10.0+dfsg-1"
          },
          {
            "binary_name": "orthanc",
            "binary_version": "1.10.0+dfsg-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "orthanc",
        "purl": "pkg:deb/ubuntu/orthanc@1.10.0+dfsg-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.9.2+really1.9.1+dfsg-1",
        "1.9.7+dfsg-3ubuntu1",
        "1.9.7+dfsg-3ubuntu2",
        "1.9.7+dfsg-4",
        "1.9.7+dfsg-5",
        "1.9.7+dfsg-6",
        "1.10.0+dfsg-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "liborthancframework1",
            "binary_version": "1.12.2+dfsg-1build4"
          },
          {
            "binary_name": "orthanc",
            "binary_version": "1.12.2+dfsg-1build4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "orthanc",
        "purl": "pkg:deb/ubuntu/orthanc@1.12.2+dfsg-1build4?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.12.1+dfsg-3",
        "1.12.1+dfsg-4",
        "1.12.1+dfsg-4build1",
        "1.12.2+dfsg-1",
        "1.12.2+dfsg-1build3",
        "1.12.2+dfsg-1build4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "liborthancframework1",
            "binary_version": "1.12.7+dfsg-4build2"
          },
          {
            "binary_name": "orthanc",
            "binary_version": "1.12.7+dfsg-4build2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "orthanc",
        "purl": "pkg:deb/ubuntu/orthanc@1.12.7+dfsg-4build2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.12.6+dfsg-1",
        "1.12.7+dfsg-4",
        "1.12.7+dfsg-4build2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "liborthancframework1",
            "binary_version": "1.12.10+dfsg-2"
          },
          {
            "binary_name": "orthanc",
            "binary_version": "1.12.10+dfsg-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "orthanc",
        "purl": "pkg:deb/ubuntu/orthanc@1.12.10+dfsg-2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.12.7+dfsg-4build2",
        "1.12.9+dfsg-2",
        "1.12.10+dfsg-1",
        "1.12.10+dfsg-1build1",
        "1.12.10+dfsg-2"
      ]
    }
  ],
  "aliases": [],
  "details": "A memory exhaustion vulnerability exists in ZIP archive processing. Orthanc automatically extracts ZIP archives uploaded to certain endpoints and trusts metadata fields describing the uncompressed size of archived files. An attacker can craft a small ZIP archive containing a forged size value, causing the server to allocate extremely large buffers during extraction.",
  "id": "UBUNTU-CVE-2026-5439",
  "modified": "2026-05-20T15:24:32Z",
  "published": "2026-04-09T15:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-5439"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-5439"
    },
    {
      "type": "REPORT",
      "url": "https://kb.cert.org/vuls/id/536588"
    },
    {
      "type": "REPORT",
      "url": "https://www.machinespirits.de/"
    },
    {
      "type": "REPORT",
      "url": "https://www.orthanc-server.com/"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "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"
    }
  ],
  "upstream": [
    "CVE-2026-5439"
  ]
}



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  • 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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