This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-67419 →

UBUNTU-CVE-2026-67419

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...

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) OSV