CVE-2026-4870

Name: CVE-2026-4870
Creator: NVD / NIST
Published: 2026-06-12T21:16:23.963+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.27%

Last modified Jun 17, 2026

CVE-2026-4870 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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 estimates a 0.27% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.27%

18.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-674

Affected Software

Vendor	Product	Versions
Ibm	Qiskit Software Development Kit	>= 0.43.0, < 1.4.6
Ibm	Qiskit Software Development Kit	>= 2.0.0, < 2.4.2

References

https://www.ibm.com/support/pages/node/7276123Vendor Advisory

Timeline

Published: Jun 12, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is 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.

How severe is CVE-2026-4870?

CVE-2026-4870 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.

How do I fix CVE-2026-4870?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-4870?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST