What is CVE-2026-116501?

CVE-2026-116501 is a high-severity vulnerability in IBM Qiskit Sdk, classified under Out-of-bounds Write. CVSS score: 8.4/10. Published 2026-11-08.

How severe is CVE-2026-116501?

High severity. CVSS v3 base score is 8.4 out of 10.

Buffer overflow in IBM Qiskit Sdk

CVE-2026-116501

IBM Qiskit SDK 2.4.0 through 2.6.1 could allow a local attacker to execute arbitrary code due to an out-of-bounds write caused by improper input validation when accessing a corrupted unitary matrix.

Vulnerability class: Buffer Overflow

Published 2026-11-08 · last modified 2026-11-08.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

IBM Qiskit Sdk

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

www.ibm.com/support/pages/node/7295237 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-116501?: CVE-2026-116501 is a high-severity vulnerability in IBM Qiskit Sdk, classified under Out-of-bounds Write. CVSS score: 8.4/10. Published 2026-11-08.
How severe is CVE-2026-116501?: High severity. CVSS v3 base score is 8.4 out of 10.