o6 Automation open62541 Integer Overflow or Wraparound

{
  "id": "5b42d9aae0da2bdd7dd112e351734cffbf5bfeec46e2145815cc34cd79c026da",
  "url": "https://osv.dev/vulnerability/CVE-2026-63559",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "o6 Automation open62541 Integer Overflow or Wraparound",
    "summary": "An integer overflow in the UA_Variant arrayDimensions product computation in open62541 may allow a remote attacker to read out-of-bounds heap memory, potentially disclosing sensitive information.",
    "evidence": "osv:CVE-2026-63559",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-63559",
      "aliases": [
        "CVE-2026-63559"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/open62541/open62541",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "41f4deef34a9d0f94fcb830e2c831a9eb6236ade"
                },
                {
                  "introduced": "84347820c8550b5750f2cd581c14ab201611c579"
                },
                {
                  "last_affected": "f63e2a819aff6e468242dc2e54ccbd5b75d63654"
                },
                {
                  "introduced": "b90fbfac5ef484089447bf5e3fe6ad7baaaebada"
                },
                {
                  "last_affected": "dfd44a234645ed29cc6d190048bc8ae80c5454cd"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.3.0"
                      },
                      {
                        "last_affected": "1.3.17"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "1.4.0"
                      },
                      {
                        "last_affected": "1.4.16"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "1.5.0"
                      },
                      {
                        "last_affected": "1.5.4"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.5.4",
            "v1.5.3",
            "v1.3.17",
            "v1.5.2",
            "v1.4.16",
            "v1.5.1",
            "v1.4.15",
            "v1.5.0",
            "v1.3.16",
            "v1.4.14",
            "v1.4.13",
            "v1.4.12",
            "v1.4.11.1",
            "v1.4.11",
            "v1.4.10",
            "v1.4.9",
            "v1.3.15",
            "v1.4.8",
            "v1.4.7",
            "v1.4.6",
            "v1.3.14",
            "v1.4.5",
            "v1.3.13",
            "v1.4.4",
            "v1.3.12",
            "v1.4.3",
            "v1.4.2",
            "prev-v1.4.2",
            "v1.3.11",
            "v1.4.1",
            "v1.3.10",
            "v1.4.0",
            "v1.3.9",
            "v1.3.8",
            "v1.3.7",
            "v1.3.6",
            "v1.3.3",
            "v1.3.5",
            "v1.3.4",
            "v1.3.2",
            "v1.3.1",
            "v1.3",
            "v1.3-rc2-ef2",
            "v1.3-rc2-ef",
            "v1.3-rc2",
            "v1.3-rc1",
            "v1.2-rc1",
            "v1.1",
            "v1.1-rc1",
            "basic256sha256",
            "v1.1-dev",
            "v1.0-dev",
            "v1.0-rc3",
            "v0.2.0-RC1",
            "v0.1.0-RC4",
            "v0.1.0-RC1",
            "v0.0.0-150309",
            "v0.1-automation14"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63559.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:32.873041985Z",
      "provider": "osv",
      "references": [
        "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-08.json",
        "https://github.com/open62541/open62541/pull/8235/commits/b666d35769ce63998442e4d0810a3fb10b50179f",
        "https://github.com/open62541/open62541/pull/8236/commits/06b99fef667c8ec5bdf0605b4f00c84fcc1d3a60",
        "https://github.com/open62541/open62541/pull/8237/commits/1b71d9c5d9c4d02d4729b8903a52e9f530bf804e",
        "https://github.com/open62541/open62541/pull/8238/commits/afab4107bfd161da9ce8bb30ed77f3968c9c97df",
        "https://www.o6-automation.com/contact",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63559.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-63559",
        "https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-08"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-190"
        ],
        "cna_assigner": "icscert",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "master"
                  },
                  {
                    "last_affected": "master"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandaloneSingleVersion"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63559.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-63559",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 500155,
  "published_at": "2026-07-30T21:47:21.231+00:00"
}