Vulnerability details

CVE-2026-4870

IBM Qiskit SDK

Qiskit SDK is vulnerable to specific functions may recurse too deeply and overflow the available stack space, when encountering certain classical expressions.

CVSS 3.1

7.5High

Official 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.

CVSS scores

Score	Version	Source	Vector
7.5High	3.1	CVEProject cvelistV5 (CNA) (ibm)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`

Affected products

Vendor	Product	Versions	Source
IBM	Qiskit SDK	0.43.0 ≤ v ≤ 2.5.0	CVEProject cvelistV5 (CNA)

References and advisories

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

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Details

Published: 2026-06-13
Last updated: 2026-06-15
State: Published
Assigner (CNA): ibm

Exploit prediction (EPSS)

0.26%

Probability of exploitation in 30 days

19%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: None
Technical impact: Partial

Weaknesses (CWE)

CWE-674
Uncontrolled Recursion