CVE-2026-67856

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

An issue in open62541 v.1.5.5 and before allows a remote attacker to cause a denial of service via crafted CreateSubscription, CreateMonitoredItems(Sampling), Publish, TransferSubscriptions, and DeleteSubscriptions requests

Published 2026-08-04. Last modified 2026-08-31.