open62541 History Backend ua_history_data_backend_memory.c UA_DataValue_backend_copyRange use after free

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-82623",
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "dateUpdated": "2026-08-31T06:15:08.682Z",
    "dateReserved": "2026-08-30T08:04:53.909Z",
    "datePublished": "2026-08-31T06:15:08.682Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB",
        "dateUpdated": "2026-08-31T06:15:08.682Z"
      },
      "title": "open62541 History Backend ua_history_data_backend_memory.c UA_DataValue_backend_copyRange use after free",
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability was detected in open62541 up to 1.5.5. Affected by this vulnerability is the function UA_DataValue_backend_copyRange of the file plugins/historydata/ua_history_data_backend_memory.c of the component History Backend. The manipulation results in use after free. The attack can be launched remotely. The exploit is now public and may be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability."
        }
      ],
      "affected": [
        {
          "vendor": "n/a",
          "product": "open62541",
          "cpes": [
            "cpe:2.3:a:open62541:open62541:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "History Backend"
          ],
          "versions": [
            {
              "version": "1.5.0",
              "status": "affected"
            },
            {
              "version": "1.5.1",
              "status": "affected"
            },
            {
              "version": "1.5.2",
              "status": "affected"
            },
            {
              "version": "1.5.3",
              "status": "affected"
            },
            {
              "version": "1.5.4",
              "status": "affected"
            },
            {
              "version": "1.5.5",
              "status": "affected"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "Use After Free",
              "cweId": "CWE-416",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "Memory Corruption",
              "cweId": "CWE-119",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://vuldb.com/vuln/397123",
          "name": "VDB-397123 | open62541 History Backend ua_history_data_backend_memory.c UA_DataValue_backend_copyRange use after free",
          "tags": [
            "vdb-entry",
            "technical-description"
          ]
        },
        {
          "url": "https://vuldb.com/vuln/397123/cti",
          "name": "VDB-397123 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ]
        },
        {
          "url": "https://vuldb.com/cve/CVE-2026-82623",
          "name": "CVE-2026-82623 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ]
        },
        {
          "url": "https://vuldb.com/submit/893207",
          "name": "Submit #893207 | open62541 Project open62541 1.5.5 Use After Free",
          "tags": [
            "third-party-advisory"
          ]
        },
        {
          "url": "https://github.com/open62541/open62541/issues/8199",
          "tags": [
            "exploit",
            "issue-tracking"
          ]
        },
        {
          "url": "https://github.com/open62541/open62541/",
          "tags": [
            "product"
          ]
        }
      ],
      "metrics": [
        {},
        {
          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM"
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            "baseSeverity": "MEDIUM"
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          "cvssV2_0": {
            "version": "2.0",
            "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:ND/RC:UR",
            "baseScore": 5
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      ],
      "timeline": [
        {
          "time": "2026-08-30T00:00:00.000Z",
          "lang": "en",
          "value": "Advisory disclosed"
        },
        {
          "time": "2026-08-30T02:00:00.000Z",
          "lang": "en",
          "value": "VulDB entry created"
        },
        {
          "time": "2026-08-30T10:09:59.000Z",
          "lang": "en",
          "value": "VulDB entry last update"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "VULL (VulDB User)",
          "type": "reporter"
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          "lang": "en",
          "value": "VulDB CNA Team",
          "type": "coordinator"
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    }
  }
}