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Advisory record · GHSA-6m2c-76ff-6vrf

Qiskit allows arbitrary code execution decoding QPY format versions < 13

CVSS 9.8 CriticalCriticalEPSS 0.0081 · 57th percentile

Critical, because:

  • CVSS score 9.8: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 29 Jun 2026, 11:50 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
qiskitPyPI<1.4.2 || >=2.0.0rc1, <2.0.0rc21.4.2, 2.0.0rc2
Identifiers
GHSA-6m2c-76ff-6vrf · CVE-2025-2000 · PYSEC-2026-510 · PYSEC-2026-511
Weakness (CWE)
CWE-502
Tags
Published
29 Jun 2026
Updated
2 Jul 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Qiskit versions before 1.4.2, and versions from 2.0.0rc1 up to but not including 2.0.0rc2, are vulnerable when loading QPY files in formats below version 13. An attacker who supplies a maliciously crafted QPY file that a process loads with qiskit.qpy.load() can execute arbitrary Python code. Upgrade to Qiskit 1.4.2 or 2.0.0rc2.

Written 10 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.8 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CNA (ibm)
  • CISA KEV Not listed.
  • EPSS 0.0081, the 57th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 14 Mar 2025, 19:56 UTC Confirmed by GitHub Advisory Database

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.