CVE-2026-54156

node-opcua is an OPC UA implementation for TypeScript and Node.js. Prior to 2.166.0, the process-global g_alreadyUsedNonce cache used by nonceAlreadyBeenUsed in packages/node-opcua-secure-channel/source/server/server_secure_channel_layer.ts records nonces from OpenSecureChannelRequest and CreateSession without expiration or a size limit. An unauthenticated remote attacker can repeatedly create sessions with unique nonces, causing entries to persist after session expiry and accumulate across connection cycles even when maxSessions=10 limits concurrent sessions. The resulting unbounded heap growth can exhaust the default Node.js heap and crash the node-opcua server process. This issue is fixed in version 2.166.0.

• CWE-770

• https://github.com/node-opcua/node-opcua/commit/b82c2939fe9c658de58da993f2798ec5481d7313
• https://github.com/node-opcua/node-opcua/releases/tag/v2.166.0
• https://github.com/node-opcua/node-opcua/security/advisories/GHSA-6wvw-vrw4-363w

Published

Sep 14, 2026

Last Modified

Sep 14, 2026

Status

Received

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-54147http4k is a functional toolkit for Kotlin HTTP applications.…6.5
• CVE-2026-54148http4k is a functional toolkit for Kotlin HTTP applications.…8.1
• CVE-2026-54149MaxKB is an open-source AI assistant for enterprise. Prior t…8.8
• CVE-2026-5415The WP Captcha PRO (the premium version of the Advanced Goog…8.8
• CVE-2026-54150next-video is a library for adding video to Next.js applicat…6.9
• CVE-2026-54155node-opcua is an OPC UA implementation for TypeScript and No…7.7
• CVE-2026-54157LobeHub is a work-and-lifestyle space to find, build, and co…9
• CVE-2026-54158SiYuan is an open-source personal knowledge management syste…9.9
• CVE-2026-54159PrestaShop ps_facetedsearch is a module that adds layered na…10
• CVE-2026-5416Due to the improper neutralization of special elements used …8.8
• CVE-2026-54163secure_headers manages application of security headers with …4.7
• CVE-2026-54164API Platform Core is a system to create hypermedia-driven RE…6.5