This security update resolves a vulnerability in the OPC UA .NET Standard Reference Server that allows remote attackers to send malicious requests that expose sensitive information.
https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2023-31048.pdf
OPCFoundation.NetStandard.Opc.Ua.Core
OPCFoundation.NetStandard.Opc.Ua.Server