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.
History

Fri, 04 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
Description IBM Qiskit SDK 2.1.0 through 2.5.1 could allow a local attacker to cause a denial of service due to improper handling of a specially crafted object during deserialization. A malicious QPY payload can trigger a segmentation fault, causing the application to crash when deserializing untrusted input. 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.

Fri, 04 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 03 Sep 2026 20:15:00 +0000

Type Values Removed Values Added
Description IBM Qiskit SDK 2.1.0 through 2.5.1 could allow a local attacker to cause a denial of service due to improper handling of a specially crafted object during deserialization. A malicious QPY payload can trigger a segmentation fault, causing the application to crash when deserializing untrusted input.
Title Qiskit SDK is vulnerable when deserializing QPY Files and may overflow the available stack space.
First Time appeared Ibm
Ibm qiskit Sdk
Weaknesses CWE-502
CPEs cpe:2.3:a:ibm:qiskit_sdk:2.1.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:qiskit_sdk:2.5.1:*:*:*:*:*:*:*
Vendors & Products Ibm
Ibm qiskit Sdk
References
Metrics cvssV3_1

{'score': 6.2, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: ibm

Published: 2026-09-03T19:56:03.172Z

Updated: 2026-09-04T20:05:30.490Z

Reserved: 2026-08-13T19:40:18.000Z

Link: CVE-2026-19795

cve-icon Vulnrichment

Updated: 2026-09-04T13:26:20.465Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-03T20:17:19.790

Modified: 2026-09-08T14:17:08.940

Link: CVE-2026-19795

cve-icon Redhat

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