{
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          "cpes": [
            "cpe:2.3:a:ibm:qiskit_sdk:2.4.0:*:*:*:*:*:*:*",
            "cpe:2.3:a:ibm:qiskit_sdk:2.6.1:*:*:*:*:*:*:*"
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          "product": "Qiskit SDK",
          "vendor": "IBM",
          "versions": [
            {
              "lessThanOrEqual": "2.6.1",
              "status": "affected",
              "version": "2.4.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "The vulnerability was reported to IBM by Nathan Rebello."
        }
      ],
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              "value": "\u003cp\u003eIBM Qiskit SDK 2.4.0 through 2.6.1 could allow a local attacker to cause a denial of service due to unbound recursion during deserialization of untrusted QPY payloads.\u003c/p\u003e"
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      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 6.2,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-502",
              "description": "CWE-502 Deserialization of Untrusted Data",
              "lang": "en",
              "type": "CWE"
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        }
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      "providerMetadata": {
        "dateUpdated": "2026-11-08T17:04:53.713Z",
        "orgId": "9a959283-ebb5-44b6-b705-dcc2bbced522",
        "shortName": "ibm"
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      "references": [
        {
          "tags": [
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            "patch"
          ],
          "url": "https://www.ibm.com/support/pages/node/7295235"
        }
      ],
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          "lang": "en",
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              "value": "\u003cp\u003e\u003cstrong\u003eRemediation/Fixes guidance\u003c/strong\u003e:\u003c/p\u003e\u003cp\u003eThe issue is addressed in Qiskit versions v2.6.2.\u003cbr/\u003e\u003cbr/\u003e\u003c/p\u003e\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eProduct(s)\u003c/strong\u003e\u003c/td\u003e\u003ctd\u003e\u003cstrong\u003eVersion(s) number and/or range\u00a0\u003c/strong\u003e\u003c/td\u003e\u003ctd\u003e\u003cstrong\u003eRemediation/Fix/Instructions\u003c/strong\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e\u0026lt;\u003ca href=\"https://github.com/qiskit/qiskit\" rel=\"nofollow\"\u003eQiskit SDK\u003c/a\u003e - qiskit.qpy.load() function\u0026gt;\u003c/td\u003e\u003ctd\u003ev2.6.2\u003c/td\u003e\u003ctd\u003e\u003cpre\u003eUpgrade to the patched versions: qiskit v2.6.2.\u003c/pre\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/tbody\u003e\u003c/table\u003e\u003c/div\u003e\u003cp\u003e\u003c/p\u003e\u003cp\u003e\u003c/p\u003e"
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          "value": "Remediation/Fixes guidance:\n\n\n\nThe issue is addressed in Qiskit versions v2.6.2.\n\n\n\nProduct(s)Version(s) number and/or range\u00a0Remediation/Fix/Instructions\u003c Qiskit SDK https://github.com/qiskit/qiskit  - qiskit.qpy.load() function\u003ev2.6.2\n\nUpgrade to the patched versions: qiskit v2.6.2."
        }
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      "title": "Unbound Recursion in QPY deserialization can lead to denial of service",
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          ],
          "value": "Workarounds/Mitigation guidance:\n\n\n\n\nNone"
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  "cveMetadata": {
    "assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522",
    "assignerShortName": "ibm",
    "cveId": "CVE-2026-116500",
    "datePublished": "2026-11-08T17:04:53.713Z",
    "dateReserved": "2026-10-26T12:59:16.329Z",
    "dateUpdated": "2026-11-08T17:04:53.713Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}