anonhaven

CVE-2026-68904

HIGH CVSS 3.1: 7.0 EPSS 0.44%
Updated Sep 30, 2026
node-opcua
Parameter Value
CVSS 7.0 (HIGH)
Fixed In 2.170.0
Type CWE-400 (Uncontrolled Resource Consumption)
Vendor node-opcua
Public PoC No

node-opcua is an OPC UA implementation for TypeScript and Node.js. From 2.0.0 until 2.170.0, node-opcua clients using the default keepSessionAlive setting can enter a repeated reconnection cycle when an OPC UA server's clock skew causes BadInvalidTimestamp responses. ClientSessionKeepAliveManager._ping_server treated the server-originated ServiceFault as a network outage and forced a transport reconnect, while ClientTCP_transport._on_ACK_response used socket.end() after failed HEL/ACK negotiation and could leave the connection in FIN-WAIT-2 when the peer did not close. Repetition at the keepAliveInterval accumulates file descriptors and memory until the client process or container can be terminated by resource exhaustion.

This issue is fixed in version 2.170.0.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Weakness Type (CWE)

CWE-400 Uncontrolled Resource Consumption

References 7

https://github.com/node-opcua/node-opcua/commit/1959cbb8946b386d2e24a1cce05b714…
security-advisories@github.com
https://github.com/node-opcua/node-opcua/commit/481664fa6ba8204737c5a92797ff68c…
security-advisories@github.com
https://github.com/node-opcua/node-opcua/commit/4d59197e2dbd82791d7f36dad7da178…
security-advisories@github.com
https://github.com/node-opcua/node-opcua/commit/dc406fd2d364aa69dd173be21ed32a7…
security-advisories@github.com
https://github.com/node-opcua/node-opcua/pull/1497
security-advisories@github.com
https://github.com/node-opcua/node-opcua/releases/tag/v2.170.0
security-advisories@github.com
https://github.com/node-opcua/node-opcua/security/advisories/GHSA-r2pf-9cw4-5j65
security-advisories@github.com
Share Post Share Share Share