{"id":"CVE-2026-69200","title":"node-opcua is an OPC UA implementation for TypeScript and Node.js","summary":"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 unsanitiz…","severity":"low","cvss":3.7,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","cwe":["CWE-1321"],"vendor":"node-opcua","product":"node-opcua","affected":["node-opcua < 2.145.0"],"published":"2026-09-16","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:17:11.793","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-69200","references":[{"url":"https://github.com/node-opcua/node-opcua/security/advisories/GHSA-cv5q-7543-48q4","label":"security-advisories@github.com"},{"url":"https://github.com/node-opcua/node-opcua/security/advisories/GHSA-cv5q-7543-48q4","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-18T18:10:04.882409Z"},"epss":0.00331,"epssPercentile":0.2647,"ingestedAt":"2026-09-16T16:59:56.611Z","slug":"CVE-2026-69200","body":"## Overview\n\nnode-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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":32,"depthScoreParts":{"impact":20.4,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":207089,"id":"CVE-2026-69200","ts":1789757322421,"field":"exploit_available","old":"false","new":"true"}]}