vuln-cve/data/2026/19xxx/CVE-2026-19795.json

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        "cveId": "CVE-2026-19795",
        "assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522",
        "state": "PUBLISHED",
        "assignerShortName": "ibm",
        "dateReserved": "2026-08-13T19:40:18.000Z",
        "datePublished": "2026-09-03T19:56:03.172Z",
        "dateUpdated": "2026-09-04T20:05:30.490Z"
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            "title": "Qiskit SDK is vulnerable when deserializing QPY Files and may overflow the available stack space.",
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                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-502",
                            "description": "CWE-502 Deserialization of Untrusted Data",
                            "type": "CWE"
                        }
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            "affected": [
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                    "vendor": "IBM",
                    "product": "Qiskit SDK",
                    "versions": [
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                            "status": "affected",
                            "version": "2.1.0",
                            "lessThanOrEqual": "2.5.1",
                            "versionType": "semver"
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                    "cpes": [
                        "cpe:2.3:a:ibm:qiskit_sdk:2.1.0:*:*:*:*:*:*:*",
                        "cpe:2.3:a:ibm:qiskit_sdk:2.5.1:*:*:*:*:*:*:*"
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                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Qiskit could allow a local attacker to cause a denial of service due to a stack overflow during deserialization of QPY payloads. A malicious QPY payload can trigger a segmentation fault, causing the application to crash when deserializing untrusted input.",
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                            "value": "<p>Qiskit could allow a local attacker to cause a denial of service due to a stack overflow during deserialization of QPY payloads. A malicious QPY payload can trigger a segmentation fault, causing the application to crash when deserializing untrusted input.&nbsp;&nbsp;</p>"
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            "references": [
                {
                    "url": "https://www.ibm.com/support/pages/node/7285932",
                    "tags": [
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                        "patch"
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                        "version": "3.1",
                        "attackVector": "LOCAL",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "availabilityImpact": "HIGH",
                        "baseSeverity": "MEDIUM",
                        "baseScore": 6.2,
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
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            "solutions": [
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                    "lang": "en",
                    "value": "Remediation/Fixes guidance:\n\n\n\nThe issue is addressed in Qiskit versions v2.5.2. This version is patched to prevent the stack overflow by no longer evaluating the expression tree for ParameterExpression objects recursively.\n\n\n\nProduct(s)Version(s) number and/or range Remediation/Fix/Instructions<Qiskit SDK - qiskit.qpy.load() function>v2.5.2\n\nUpgrade to the patched versions: qiskit v2.5.2.",
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                            "value": "<p><strong>Remediation/Fixes guidance</strong>:</p><p>The issue is addressed in Qiskit versions v2.5.2. This version is patched to prevent the stack overflow by no longer evaluating the expression tree for ParameterExpression objects recursively.<br/><br/></p><div><table><tbody><tr><td><strong>Product(s)</strong></td><td><strong>Version(s) number and/or range </strong></td><td><strong>Remediation/Fix/Instructions</strong></td></tr><tr><td>&lt;Qiskit SDK - qiskit.qpy.load() function&gt;</td><td>v2.5.2</td><td><pre>Upgrade to the patched versions: qiskit v2.5.2.</pre></td></tr></tbody></table></div><p></p><p></p>"
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            "credits": [
                {
                    "lang": "en",
                    "value": "Issue discovered by Matthew Treinish (IBM) and Takashi Imamichi (IBM)",
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                "discovery": "UNKNOWN"
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