{"id":"CVE-2026-69200","state":"PUBLISHED","title":"node-opcua: Prototype Pollution via internal `fieldsToJson()` implementation (Related to CVE-2024-57086)","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.","publishedAt":"2026-09-16T16:15:58.656Z","updatedAt":"2026-09-18T18:10:31.375Z","severity":{"score":3.7,"label":"Low","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["node-opcua node-opcua"],"affected":[{"vendor":"node-opcua","product":"node-opcua","versions":[{"version":"< 2.145.0","status":"affected"}]}],"references":["https://github.com/node-opcua/node-opcua/security/advisories/GHSA-cv5q-7543-48q4"],"weaknesses":["CWE-1321"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/69xxx/CVE-2026-69200.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-69200","state":"PUBLISHED","datePublished":"2026-09-16T16:15:58.656Z","dateUpdated":"2026-09-18T18:10:31.375Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-08-03T16:57:50.124Z"},"containers":{"cna":{"title":"node-opcua: Prototype Pollution via internal `fieldsToJson()` implementation (Related to CVE-2024-57086)","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"node-opcua","product":"node-opcua","versions":[{"version":"< 2.145.0","status":"affected"}]}],"references":[{"url":"https://github.com/node-opcua/node-opcua/security/advisories/GHSA-cv5q-7543-48q4","name":"https://github.com/node-opcua/node-opcua/security/advisories/GHSA-cv5q-7543-48q4","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":3.7,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1321","lang":"en","description":"CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-16T16:15:58.656Z"},"source":{"advisory":"GHSA-cv5q-7543-48q4","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/node-opcua/node-opcua/security/advisories/GHSA-cv5q-7543-48q4","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-18T18:10:04.882409Z","id":"CVE-2026-69200","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-18T18:10:31.375Z"}}]}}}