RabbitMQ: Web-STOMP unbounded pre-auth accumulation
CVE-2026-67230 is fixed in rabbitmq-server on 1 platform by DEBIAN-CVE-2026-67230 (version 4.3.0-2), released September 26, 2026. It is not reported as exploited. Patch Radar priority: High.
RabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.15, 4.0.20, 4.1.11, and 4.2.6, the Web STOMP WebSocket handler enforced neither max_frame_size nor login_timeout before authentication, allowing an unauthenticated client to keep a connection alive with a slow stream of small frames and accumulate unbounded pre-authentication state. The rabbitmq_web_stomp plugin must be enabled, and no authentication is required to reach the vulnerable path. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| rabbitmq-server · Debian 14 | 4.3.0-2 | DEBIAN-CVE-2026-67230 | Sep 26, 2026 |
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