CVE-2026-116501 — Ibm Qiskit Sdk
HIGHCVE-2026-116501 is a high-severity (CVSS 8.4) Out-of-bounds Write vulnerability in ibm qiskit sdk. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.
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.
Description
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.
Affected Products
qiskit sdkibmDetection & mitigation playbook
Vendor / applianceDetect
Inventory every ibm qiskit sdk deployment and check each version against the affected-products list above.
Remediation status
The records we use list no fixed version for CVE-2026-116501. Check the ibm qiskit sdk advisory for a patched release, and apply the workarounds below until you can upgrade.
Mitigate without a patch
Stop feeding it untrusted input: reject or quarantine files and payloads from unverified sources until you can upgrade, restrict accepted formats to the ones you actually need, and run the parsing or decoding step in a least-privileged sandbox or short-lived worker so a crash or corrupted read cannot reach the rest of the process. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
Frequently Asked Questions
Is CVE-2026-116501 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.