node-opcua: TCP Socket Leak (FIN-WAIT-2) via keepalive reconnection cycle - Resource Exhaustion

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-68904
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-16 17:18:00 UTC
Updated2026-09-30 17:51:36 UTC
Descriptionnode-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.

Risk And Classification

Primary CVSS: v3.1 7 HIGH from [email protected]

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

EPSS: 0.004430000 probability, percentile 0.364790000 (date 2026-10-07)

Problem Types: CWE-400 | CWE-400 CWE-400: Uncontrolled Resource Consumption

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
3.1CNADECLARED7HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Node-opcua Node-opcua affected >= 2.0.0, < 2.170.0 Not specified

References

ReferenceSourceLinkTags
github.com/node-opcua/node-opcua/security/advisories/GHSA-r2pf-9cw4-5j65 [email protected] github.com
github.com/node-opcua/node-opcua/releases/tag/v2.170.0 [email protected] github.com
github.com/node-opcua/node-opcua/pull/1497 [email protected] github.com
github.com/node-opcua/node-opcua/commit/481664fa6ba8204737c5a92797ff68c3... [email protected] github.com
github.com/node-opcua/node-opcua/commit/1959cbb8946b386d2e24a1cce05b7148... [email protected] github.com
github.com/node-opcua/node-opcua/commit/4d59197e2dbd82791d7f36dad7da1787... [email protected] github.com
github.com/node-opcua/node-opcua/commit/dc406fd2d364aa69dd173be21ed32a7f... [email protected] github.com
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