CVE-2026-84197

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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.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "In Eclipse Ditto's Node.js JavaScript client, all released versions of <code>@eclipse-ditto/ditto-javascript-client-node</code> from 2.0.0 to 3.9.0 and of its predecessor package <code>@eclipse-ditto/ditto-javascript-client-node_1.0</code> from 1.0.0 to 2.1.0, the WebSocket transport hard-codes <code>rejectUnauthorized: false</code> when creating the underlying <code>ws</code> WebSocket. Certificate chain and hostname validation are therefore disabled for every <code>wss://</code> 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 <code>Authorization</code> header of the WebSocket upgrade request, and read, alter or inject Ditto Protocol messages for the lifetime of the connection. 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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. 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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.0.0,3.8.1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.9.0,3.9.1)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Eclipse Ditto", "source": "cna", "vendor": "Eclipse Foundation"}, "product": "ditto", "vendor": "eclipse"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.0.0,2.1.0]"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Eclipse Ditto", "source": "cna", "vendor": "Eclipse Foundation"}, "product": "ditto", "vendor": "eclipse"}], "created": "2026-09-09T10:30:09.167033+00:00", "title": "Disabled TLS Validation in Eclipse Ditto Node.js Client Enables Man\u2011in\u2011the\u2011Middle Attacks", "updated": "2026-09-11T05:00:12.214566+00:00", "vendors": ["eclipse", "eclipse$PRODUCT$ditto"]}