[ CVE-2026-67419 · Published 25 Sep 2026 ]
Vulnerability in rabbitmq-server
CVSS 6.5
EPSS <1%Fix available
[ Why it matters ]Priority signals
- Public proof-of-concept exploit exists (CISA SSVC)
[ Description ]Official description
RabbitMQ is a messaging and streaming broker. Prior to 4.3.5, an authenticated user who can bind a queue to a topic exchange and publish to it can use consecutive # segments in a binding key to make both topic matchers revisit the same trie-node and routing-key-suffix states without memoization. The matcher materializes duplicate destinations before deduplication, causing combinatorial CPU work and memory pressure that can disrupt routing for all tenants. This vulnerability is fixed in 4.3.5.
[ Fixes ]Fixes and patches
- Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD