CVE-2025-2000: IBM Qiskit

Critical severity, CVSS 9.8. EPSS: 0.8% chance of exploitation in the next 30 days.

A maliciously crafted QPY file can potential execute arbitrary-code embedded in the payload without privilege escalation when deserialising QPY formats < 13. A python process calling Qiskit 0.18.0 through 1.4.1's `qiskit.qpy.load()` function could potentially execute any arbitrary Python code embedded in the correct place in the binary file as part of specially constructed payload.

Affected products

• IBM Qiskit: from 0.18.0, before 1.4.2 (fixed in 1.4.2)

Published 2025-03-14. Last modified 2026-06-17.