What is CVE-2026-4870?

CVE-2026-4870 is a high-severity vulnerability in Ibm Qiskit Sdk, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-06-12.

How severe is CVE-2026-4870?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Ibm Qiskit Sdk

CVE-2026-4870

IBM Qiskit SDK 0.43.0 through 2.5.0 could allow an attacker to trigger a segmentation fault leading to a denial of service due to uncontrolled recursion in the parser.

EPSS: 0.003 (18.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Ibm Qiskit Sdk — versions 0.43.0
Ibm Qiskit_software_development_kit

Weakness classification (CWE)

CWE-674 — Uncontrolled Recursion

References

psirt@us.ibm.com (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-4870?: CVE-2026-4870 is a high-severity vulnerability in Ibm Qiskit Sdk, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-06-12.
How severe is CVE-2026-4870?: High severity. CVSS v3 base score is 7.5 out of 10.