Security Advisory

CVE-2026-69200

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-09-16 16:15:58

Last updated 2026-09-18 18:10:31

Assigner GitHub_M

CVSS score 3.7

State PUBLISHED

Description

node-opcua is an OPC UA implementation for TypeScript and Node.js. Prior to node-opcua-client 2.145.0, the internal fieldsToJson method in packages/node-opcua-client/source/alarms_and_conditions/client_alarm.ts directly assigns unsanitized field names and allows a __proto__.pollutedKey path to modify Object.prototype. Successful exploitation requires an application to expose attacker-controlled event fields to fieldsToJson and may cause denial of service or application logic corruption. This vulnerability is fixed in 2.145.0.

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