CVE-2026-69200

3.7 lowEPSS 0.3%

Low (3.7). EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

3.7 low

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 28% of CVEs (scores of 2026-10-31)
CWE: CWE-1321
Published: 2026-09-16
Modified: 2026-09-24
Record from: the NVD, synced 2026-10-19

References

https://github.com/node-opcua/node-opcua/security/advisories/GHSA-cv5q-7543-48q4
https://github.com/node-opcua/node-opcua/security/advisories/GHSA-cv5q-7543-48q4

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