CVE-2026-19795

Medium

Description

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.

SeverityMedium

CVSS6.2

Exploit probability—

Product

Ibm Qiskit Sdk

PublishedSep 3, 2026

First seenSep 3, 2026

Weakness typeCWE-502Deserialization of untrusted data

How to fix

Patches

ibm.com/support/pages/node/7285932

Affected products

Product	Affected versions	Fixed in
ibm qiskit_sdk	2.1.0 ≤ v ≤ 2.5.1	—

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.