CVE-2026-19795 — Qiskit SDK is vulnerable when deserializing QPY Files and may overflow the available stack space.

CVE-2026-19795

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

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
IBM / Qiskit SDK	affected 2.1.0 through 2.5.1

CWE

CWE-502

References

https://www.ibm.com/support/pages/node/7285932

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.