CVE-2026-84197
CriticalCVSS 9.2Summary
In Eclipse Ditto's Node.js JavaScript client, all released versions of @eclipse-ditto/ditto-javascript-client-node from 2.0.0 to 3.9.0 and of its predecessor package @eclipse-ditto/ditto-javascript-client-node_1.0 from 1.0.0 to 2.1.0, the WebSocket transport hard-codes rejectUnauthorized: false when creating the underlying ws WebSocket. Certificate chain and hostname validation are disabled for every wss:// connection, with no builder option, constructor argument, or environment variable to enable it. An attacker intercepting the connection can present an arbitrary certificate, complete the TLS handshake, read credentials sent in the Authorization header, and read, alter, or inject Ditto Protocol messages.
Risk Assessment
Connection interception could lead to credential theft and data manipulation between client and server, compromising confidentiality and integrity.
Recommendation
Upgrade @eclipse-ditto/ditto-javascript-client-node to version 3.9.1 or later (if available) or apply a workaround such as a custom WebSocket implementation with certificate validation enabled.
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Original NVD description (English source)
In Eclipse Ditto's Node.js JavaScript client, all released versions of @eclipse-ditto/ditto-javascript-client-node from 2.0.0 to 3.9.0 and of its predecessor package @eclipse-ditto/ditto-javascript-client-node_1.0 from 1.0.0 to 2.1.0, the WebSocket transport hard-codes rejectUnauthorized: false when creating the underlying ws WebSocket. Certificate chain and hostname validation are therefore disabled for every wss:// connection, and no builder option, constructor argument or environment variable lets an application turn validation back on. An attacker in a position to intercept the connection can present an arbitrary certificate, complete the TLS handshake, read the credentials that the configured authentication provider sends in the Authorization header of the WebSocket upgrade request, and read, alter or inject Ditto Protocol messages for the lifetime of the connection. The Java client, the browser/DOM JavaScript client and the HTTP transport of the Node.js client are not affected.

