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Response snapshot Nov 4, 2026, 23:06 UTC

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VulnerabilityCVE-2025-2000

Qiskit allows arbitrary code execution decoding QPY format versions < 13

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.

At a glance

Exploited
Not known
Severity
9.8 Critical (CVSS 3.1)
Chance of exploitation
Not estimated
Sources
1 source

What to do

GitHub lists first patched versions: qiskit: 1.4.2; qiskit: 2.0.0rc2. Confirm the affected range and upgrade guidance in the exact advisory.

Read GitHub-reviewed advisory GHSA-6m2c-76ff-6vrf (opens a new tab)

What happened

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

Continue reading

Affected package ranges reported by GitHub: qiskit-terra: >= 0.18.0, <= 0.46.3 qiskit: <= 1.4.1 qiskit: = 2.0.0rc1

Scores and how they were measured

CVSS base severity

9.8

Version 3.1As of

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Measurement source (opens a new tab)

How bad it is if exploited. Not a prediction of exploitation or proof you are exposed.

EPSS probability

Not available

A model's estimate of exploitation in the next 30 days, not certainty or your own risk.

Related technology

Sources

  1. Primary source

    GitHub-reviewed advisory GHSA-6m2c-76ff-6vrf (opens a new tab)

    The public advisory supplies the description, affected package/version ranges, and any listed CVSS metric. GitHub review is not local review.

    Published Checked

  2. Primary source

    GitHub public advisory API page (opens a new tab)

    The API page supplied GHSA-6m2c-76ff-6vrf, its actual identifiers, source dates, and structured metrics.

    Published Date not suppliedChecked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, November 4). Qiskit allows arbitrary code execution decoding QPY format versions < 13 (CVE-2025-2000). https://kevwire.com/record/CVE-2025-2000

MLA

"Qiskit allows arbitrary code execution decoding QPY format versions < 13 (CVE-2025-2000)." KEVWire, 4 Nov. 2026, kevwire.com/record/CVE-2025-2000.

Chicago

KEVWire. "Qiskit allows arbitrary code execution decoding QPY format versions < 13 (CVE-2025-2000)." Last modified November 4, 2026. https://kevwire.com/record/CVE-2025-2000.

Evidence summary (plain text)

Qiskit allows arbitrary code execution decoding QPY format versions < 13 (Mar 14, 2025).
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.

Fixed in Qiskit 1.4.2 and in Qiskit 2.0.0rc2
CVSS 9.8 (version 3.1; evidence as of Nov 4, 2026; https://github.com/advisories/GHSA-6m2c-76ff-6vrf).
Sources:
GitHub-reviewed advisory GHSA-6m2c-76ff-6vrf: https://github.com/advisories/GHSA-6m2c-76ff-6vrf
GitHub public advisory API page: https://api.github.com/advisories?type=reviewed&per_page=100&sort=updated&direction=desc
Record ID: CVE-2025-2000.
Record origin: Ingested record.
AI evidence: Not assessed.
Known exploitation: Not assessed.
Zero-day status: Not assessed. KEV membership alone does not establish zero-day status.
About this data

This record was ingested from a data source. Retrieved: Nov 4, 2026, 23:05 UTC. Ingestion is not an independent editorial investigation.

A CISA KEV listing documents known exploitation, not necessarily a zero-day; absence from the catalog does not prove a vulnerability has never been exploited.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

Record JSON

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Record details

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