What’s Vulnerable › Vulnerabilities
CVE-2026-19795: Qiskit SDK is vulnerable when deserializing QPY Files and may overflow the available stack space.
- Severity: medium (CVSS 6.2 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-03 · updated 2026-09-08
- Weakness: CWE-502
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
- IBM Qiskit SDK: from 2.1.0 through 2.5.1
References
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