CVE-2026-54156

CVE-2026-54156 · node-opcua: Unbounded nonce cache enables unauthenticated heap exhaustion DoS

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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.

CVSS 7.5 · Высокий · EPSS 0,8% · Есть исправление

Опубликовано

2026-09-14T16:09:07.744Z

Обновлено

2026-09-14T16:35:48.958Z

Стек: node

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