FKIE_CVE-2026-5442

Vulnerability from fkie_nvd - Published: 2026-04-09 15:16 - Updated: 2026-04-14 20:19
Severity ?
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
A heap buffer overflow vulnerability exists in the DICOM image decoder. Dimension fields are encoded using Value Representation (VR) Unsigned Long (UL), instead of the expected VR Unsigned Short (US), which allows extremely large dimensions to be processed. This causes an integer overflow during frame size calculation and results in out-of-bounds memory access during image decoding.
References
cret@cert.orghttps://kb.cert.org/vuls/id/536588Third Party Advisory, VDB Entry
cret@cert.orghttps://www.machinespirits.de/Not Applicable
cret@cert.orghttps://www.orthanc-server.com/Product
Impacted products
Vendor Product Version
orthanc-server orthanc *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:orthanc-server:orthanc:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A259075D-8B77-4B04-BC42-3E5ABE9DFE1F",
              "versionEndExcluding": "1.12.11",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A heap buffer overflow vulnerability exists in the DICOM image decoder. Dimension fields are encoded using Value Representation (VR) Unsigned Long (UL), instead of the expected VR Unsigned Short (US), which allows extremely large dimensions to be processed. This causes an integer overflow during frame size calculation and results in out-of-bounds memory access during image decoding."
    }
  ],
  "id": "CVE-2026-5442",
  "lastModified": "2026-04-14T20:19:46.320",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-04-09T15:16:16.543",
  "references": [
    {
      "source": "cret@cert.org",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "https://kb.cert.org/vuls/id/536588"
    },
    {
      "source": "cret@cert.org",
      "tags": [
        "Not Applicable"
      ],
      "url": "https://www.machinespirits.de/"
    },
    {
      "source": "cret@cert.org",
      "tags": [
        "Product"
      ],
      "url": "https://www.orthanc-server.com/"
    }
  ],
  "sourceIdentifier": "cret@cert.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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  • 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.



Detection rules are retrieved from Rulezet.