Vulnerability Description
RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1, get_chunk_selector/1 calls binary_to_atom on the raw client-supplied <<"chunk_selector">> property from post-auth subscribe and resolve_offset_spec frames, with no whitelist and no existing guard. An authenticated stream client with read access to any stream can crash the broker node. Preconditions include rabbitmq_stream plugin enabled Authenticated stream-protocol user with read access to at least one stream. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1.
Related Weaknesses (CWE)
References
- https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6
- https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.1
- https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-48hm-chgv-3
- https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-48hm-chgv-3
FAQ
What is CVE-2026-66072?
CVE-2026-66072 is a documented vulnerability. RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1, get_chunk_selector/1 calls binary_to_atom on the raw client-supplied <<"chunk_selector">> pro...
How severe is CVE-2026-66072?
CVSS scoring is not yet available for CVE-2026-66072. Check NVD for updates.
Is there a patch for CVE-2026-66072?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.