CVE-2026-103653

{
  "id": "CVE-2026-103653",
  "sourceIdentifier": "a59d8014-47c4-4630-ab43-e1b13cbe58e3",
  "published": "2026-11-03T08:17:13.830",
  "lastModified": "2026-11-03T08:17:13.830",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An out-of-bounds read vulnerability in the Qt CoAP message parsing (QCoapInternalReply::createFromFrame()) of the Qt CoAP module. Processing a malformed CoAP message can cause an application using Qt CoAP to crash (loss of availability) or to continue operating on incorrect data (potential loss of integrity)."
    }
  ],
  "affected": [
    {
      "source": "a59d8014-47c4-4630-ab43-e1b13cbe58e3",
      "affectedData": [
        {
          "vendor": "qt",
          "product": "Qt",
          "defaultStatus": "unaffected",
          "cpes": [
            "cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*",
            "cpe:2.3:a:qt:qtcoap:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "qtcoap"
          ],
          "versions": [
            {
              "version": "5.13.0",
              "lessThanOrEqual": "6.8.8",
              "versionType": "python",
              "status": "affected"
            },
            {
              "version": "6.9.0",
              "lessThanOrEqual": "6.11.2",
              "versionType": "python",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "5.13.0",
              "versionType": "python",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "a59d8014-47c4-4630-ab43-e1b13cbe58e3",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:U/V:X/RE:L/U:Amber",
          "baseScore": 6.7,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "LOW",
          "vulnAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "UNREPORTED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "YES",
          "Recovery": "USER",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "LOW",
          "providerUrgency": "AMBER"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "a59d8014-47c4-4630-ab43-e1b13cbe58e3",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://codereview.qt-project.org/c/qt/qtcoap/+/760652",
      "source": "a59d8014-47c4-4630-ab43-e1b13cbe58e3"
    },
    {
      "url": "https://codereview.qt-project.org/c/qt/qtcoap/+/761120",
      "source": "a59d8014-47c4-4630-ab43-e1b13cbe58e3"
    },
    {
      "url": "https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-103653:",
      "source": "a59d8014-47c4-4630-ab43-e1b13cbe58e3"
    }
  ]
}