CVE-2026-19795mediumCWE-502

CVE-2026-19795: medium-severity vulnerability in IBM Qiskit SDK

Qiskit SDK is vulnerable when deserializing QPY Files and may overflow the available stack space.

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13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.2epss 0.3%
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.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
IBM · Qiskit SDK
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