---
id: CVE-2026-95860
title: >-
  node-opcua: Namespace-Level RBAC Fail-Open - Anonymous Write/Call Bypass via
  Unbound `DefaultRolePermissions
summary: >-
  node-opcua is an OPC UA implementation for TypeScript and Node.js. From 2.42.0
  until 2.180.0, namespace-level access control configured through
  setDefaultRolePermissions is not honored by the runtime enforcement path for
  nodes without ex…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-285
  - CWE-636
  - CWE-863
  - CWE-1188
vendor: node-opcua
product: node-opcua
affected:
  - 'node-opcua >= 2.42.0, < 2.180.0'
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T20:11:38.816Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-95860'
references:
  - url: >-
      https://github.com/node-opcua/node-opcua/security/advisories/GHSA-xggf-m53x-jc3f
    label: >-
      https://github.com/node-opcua/node-opcua/security/advisories/GHSA-xggf-m53x-jc3f
  - url: 'https://github.com/node-opcua/node-opcua/pull/1580'
    label: 'https://github.com/node-opcua/node-opcua/pull/1580'
  - url: >-
      https://github.com/node-opcua/node-opcua/commit/0261e873900800983c622e01120f484dc6063698
    label: >-
      https://github.com/node-opcua/node-opcua/commit/0261e873900800983c622e01120f484dc6063698
  - url: 'https://github.com/node-opcua/node-opcua/releases/tag/v2.180.0'
    label: 'https://github.com/node-opcua/node-opcua/releases/tag/v2.180.0'
tags:
  - cve.org
epss: 0.00596
epssPercentile: 0.4861
ingestedAt: '2026-11-05T20:33:06.432Z'
---

## Overview

node-opcua is an OPC UA implementation for TypeScript and Node.js. From 2.42.0 until 2.180.0, namespace-level access control configured through setDefaultRolePermissions is not honored by the runtime enforcement path for nodes without explicit per-node RolePermissions. SessionContext.getApplicableRolePermissions reads a missing or null DefaultRolePermissions metadata value instead of the configured namespace field, and the null result is treated permissively. An anonymous network client can consequently write variables with CurrentWrite access or call bound methods when an operator configured a restrictive namespace default and relied on inheritance. Servers with no declared policy, nodes with explicit per-node permissions, and correctly bound programmatic namespace metadata are outside the authorization-bypass case. This issue is fixed in version 2.180.0.

## Affected

- `node-opcua >= 2.42.0, < 2.180.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.