6.2
Medium
CVE-2026-19795 Qiskit could allow a local attacker to cause a denial of service due to a stack overflow during deserialization of QPY…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Qiskit SDK 2.1 | 2.1.0 → 2.5.1 | No fix stated |
Other CVEs of Qiskit SDK
The 4 CVEs of Qiskit SDK →
CVE-2026-4870
IBM Qiskit SDK 0.43.0 through 2.5.0 could allow an attacker to trigger a segmentation fault leading to a denial of…
7.5
High
CVE-2025-2000
A maliciously crafted QPY file can potential execute arbitrary-code embedded in the payload without privilege escalation…
9.8
Critical
CVE-2025-1403
Qiskit SDK 0.45.0 through 1.2.4 could allow a remote attacker to cause a denial of service using a maliciously crafted…
8.6
High