Denial of Service Vulnerability in IBM Qiskit SDK Affected Versions
CVE-2026-4870

7.5HIGH

Key Information:

Vendor

IBM
Status
Qiskit Sdk
Vendor
CVE Published:
12 June 2026

What is CVE-2026-4870?

The IBM Qiskit SDK versions 0.43.0 through 2.5.0 are susceptible to a vulnerability that can be exploited by an attacker to induce a segmentation fault. This occurs due to uncontrolled recursion in the parser component, leading to a denial of service. When triggered, this flaw can render the SDK unresponsive, affecting the availability of services that depend on it. Users of the affected versions are advised to take precautionary measures and consider applying any available patches to mitigate this issue.

Affected Version(s)

Qiskit SDK 0.43.0 <= 2.5.0

References

https://www.ibm.com/support/pages/node/7276123
vendor-advisorypatch

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This vulnerability was reported to IBM by Ali Sherif.
.