{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "1.5.0"
                  },
                  {
                    "fixed": "1.5.7"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              },
              {
                "range": [
                  {
                    "fixed": "0cf4806768c493bc6ccffcd4419da24153b970ec"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "original_tag": "v1.5.7",
                "range": [
                  {
                    "fixed": "d1173ccc31560ffc60c29e24ce8adb19f8c3c686"
                  }
                ],
                "source": "REFERENCES_TAG"
              }
            ]
          },
          "events": [
            {
              "introduced": "b90fbfac5ef484089447bf5e3fe6ad7baaaebada"
            },
            {
              "fixed": "d1173ccc31560ffc60c29e24ce8adb19f8c3c686"
            },
            {
              "fixed": "0cf4806768c493bc6ccffcd4419da24153b970ec"
            }
          ],
          "repo": "https://github.com/open62541/open62541",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-190"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/116xxx/CVE-2026-116014.json"
  },
  "details": "open62541 1.5.0 before 1.5.7 contains an integer overflow in UA_DataType_fromStructureDescription() that wraps the 16-bit memSize field for large custom structure definitions. A malicious OPC UA server can supply DataType definitions via UA_Client_getRemoteDataTypes(), causing decodeBinaryStructure() to overflow the heap, crashing clients or enabling code execution.",
  "id": "CVE-2026-116014",
  "modified": "2026-10-31T02:30:42.770451079Z",
  "published": "2026-10-24T11:40:32.200Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/116xxx/CVE-2026-116014.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/open62541/open62541/releases/tag/v1.5.7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116014"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/open62541-1.5.0-before-1.5.7-integer-overflow-heap-buffer-overflow-via-custom-datatype"
    },
    {
      "type": "FIX",
      "url": "https://github.com/open62541/open62541/commit/0cf4806768c493bc6ccffcd4419da24153b970ec"
    },
    {
      "type": "FIX",
      "url": "https://github.com/open62541/open62541/pull/8298"
    },
    {
      "type": "FIX",
      "url": "https://github.com/open62541/open62541/pull/8302"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/open62541/open62541"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/open62541/open62541/blob/v1.5.6/src/ua_types_definition.c#L274"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "open62541 1.5.0 before 1.5.7 Integer Overflow Heap Buffer Overflow via Custom DataType"
}