CVE-2026-67241 RabbitMQ: AMQP 1.0 management exchange.declare skips alternate-exchange permission check
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-67241?
CVE-2026-67241 is a medium-severity vulnerability in Broadcom Rabbitmq Server, published on 25 Sep 2026.
Official description
RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.2.9 and 4.3.3, AMQP 1.0 management exchange.declare skips alternate-exchange permission check. pUT /exchanges/:name (lines 192-240) checks only configure on the declared exchange and passes XArgs straight to rabbitexchange:declare/7. It omits the checkreadpermitted(X) + checkwritepermitted(AE) that rabbitchannel.erl:2540-2548 enforces for the alternate-exchange argument on the AMQP 0-9-1 path. The same file already implements the analogous DLX check for queues (lines 708-719), confirming this is a missing-check bug rather than intentional A user with only configure on exchange X can route X's unroutable messages into an alternate exchange they have no write permission AMQP 1.0 enabled (default in RabbitMQ 4.x) Attacker has configure on at least one exchange but lacks write on the target. This issue is fixed in versions 4.2.9 and 4.3.3.
Weakness: CWE-862
Which versions are affected by CVE-2026-67241?
1 open source package ship an affected version, including rabbitmq. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
rabbitmq Bitnami | From 4.2.0 | 4.2.9, 4.3.3 |
Products include Broadcom Rabbitmq Server.
How do I fix CVE-2026-67241?
Upgrade rabbitmq to a fixed version for your release line: 4.2.9 or 4.3.3.
Is CVE-2026-67241 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67241 exists.
Other vulnerabilities in Broadcom Rabbitmq Server
- CVE-2016-9877 Auth bypass in Pivotal RabbitMQ 3.x before 3.5.8 and 3.6.x before 3.6.6; RabbitMQ for PCF 1.5.x before 1.5.20, 1.6.x before 1.6.12 and 1.7.x before 1.7.7
- CVE-2026-67404 RabbitMQ: OAuth2 silent verify_none fallback for JWKS fetch
- CVE-2026-67231 RabbitMQ: Trust-store whitelist by Issuer+Serial only
- CVE-2026-57219 Information disclosure in rabbitmq-server
- CVE-2026-67236 RabbitMQ: Plaintext username:password stored in an insecure cookie after successful POST /login
Sources
Also known as BIT-rabbitmq-2026-67241, DEBIAN-CVE-2026-67241, GHSA-rg2g-289m-xhhw, UBUNTU-CVE-2026-67241.