CVE-2026-67405

Summary

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, Neither the Web-MQTT handler (deps/rabbitmq_web_mqtt/src/rabbit_web_mqtt_handler.erl:104) nor the Web-STOMP handler (deps/rabbitmq_web_stomp/src/rabbit_web_stomp_handler.erl:102) validates the Origin header on the WebSocket upgrade. Under ssl_cert_login=true, the browser presents the client certificate automatically, so an attacker's JavaScript running in the victim's browser can authenticate as the victim. Preconditions include The non-default configuration use_http_auth=true (Web-STOMP) or ssl_cert_login=true (both plugins) must be enabled. The issue is harmless under the default in-band CONNECT credential configuration.. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.

Affected Software

VendorProductVersion RangeStatus
rabbitmqrabbitmq-server>= 3.13.0, < 3.13.15affected
rabbitmqrabbitmq-server>= 4.0.0, < 4.0.20affected
rabbitmqrabbitmq-server>= 4.1.0, < 4.1.11affected
rabbitmqrabbitmq-server>= 4.2.0, < 4.2.6affected

Weaknesses

  • CWE-1385: CWE-1385: Missing Origin Validation in WebSockets

References