node-opcua: Prototype Pollution via internal `fieldsToJson()` implementation (Related to CVE-2024-57086) (CVE-2026-69200) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-69200

node-opcua: Prototype Pollution via internal `fieldsToJson()` implementation (Related to CVE-2024-57086)

Answer in brief

CVE-2026-69200 records a Unknown severity vulnerability in node-opcua: Prototype Pollution via internal `fieldsToJson()` implementation (Related to CVE-2024-57086). The current sources do not mark it as known exploited. The current feed maps node-opcua/node-opcua (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 16, 2026Updated Sep 16, 2026Source checked Sep 16, 2026First seen by HOL Sep 16, 2026Material review Sep 16, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps node-opcua/node-opcua (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
node-opcua/node-opcuageneric	< 2.145.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for node-opcua/node-opcua.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 16, 2026

Sources and claim methodology

GitHub security advisorygithub.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.