CRITICAL9.8

PYSEC-2026-510

Qiskit allows arbitrary code execution decoding QPY format versions < 13

Quick fix

PYSEC-2026-510 — qiskit: upgrade to the fixed version with the command below.

pip install --upgrade 'qiskit>=1.4.2'

Details

### Impact

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

### Patches

Fixed in Qiskit 1.4.2 and in Qiskit 2.0.0rc2

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/qiskit

Introduced in: 0Fixed in: 1.4.2

Fixpip install --upgrade 'qiskit>=1.4.2'

References

https://github.com/Qiskit/qiskit/security/advisories/GHSA-6m2c-76ff-6vrf[WEB]
https://nvd.nist.gov/vuln/detail/CVE-2025-2000[ADVISORY]
https://github.com/Qiskit/qiskit[PACKAGE]
https://www.ibm.com/support/pages/node/7185949[WEB]
https://pypi.org/project/qiskit[PACKAGE]
https://github.com/advisories/GHSA-6m2c-76ff-6vrf[ADVISORY]