VulnerabilityAwaiting Analysis

CVE-2026-19795

Qiskit could allow a local attacker to cause a denial of service due to a stack overflow during deserialization of QPY payloads.

MEDIUM 6.2EPSS 0.11%

Does this matter?

Lower severity and a low EPSS score (0.11%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 3.1: 6.2 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.11% probability · 2th percentile
CISA KEV: Not listed
Weakness: CWE-502
Source: psirt@us.ibm.com

References

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

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.