CVE-2026-67857

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

open62541 1.5.5 contains an out-of-bounds read in the client-side function responseReadNamespacesArray() in src/client/ua_client_connect.c.

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