| Name | CVE-2026-67419 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1149180 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| rabbitmq-server (PTS) | bookworm, bookworm (security) | 3.10.8-1.1+deb12u1 | fixed |
| trixie | 4.0.5-6+deb13u2 | fixed |
| forky, sid | 4.3.6-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[trixie] - rabbitmq-server <not-affected> (Vulnerable code not present, only affects 4.3.x)
[bookworm] - rabbitmq-server <not-affected> (Vulnerable code not present, only affects 4.3.x)
https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-h964-v5mf-22cq
https://github.com/rabbitmq/rabbitmq-server/commit/c5ed7c4e97e02be688730803604cc7a88dbe4864 (v4.3.5)