What is CVE-2026-116499?

CVE-2026-116499 is a high-severity vulnerability in IBM Qiskit Sdk, classified under Deserialization of Untrusted Data. CVSS score: 8.4/10. Published 2026-11-08.

How severe is CVE-2026-116499?

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

Deserialization in IBM Qiskit Sdk

CVE-2026-116499

IBM Qiskit SDK 1.4.2 through 2.6.2 could allow a local attacker to execute arbitrary code due to deserialization of untrusted data.

Vulnerability class: Insecure Deserialization

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-502 — Deserialization of Untrusted Data

References

www.ibm.com/support/pages/node/7295238 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-116499?: CVE-2026-116499 is a high-severity vulnerability in IBM Qiskit Sdk, classified under Deserialization of Untrusted Data. CVSS score: 8.4/10. Published 2026-11-08.
How severe is CVE-2026-116499?: High severity. CVSS v3 base score is 8.4 out of 10.