Medium severity6.5NVD Advisory· Published Sep 25, 2026· Updated Oct 15, 2026
CVE-2026-67222
CVE-2026-67222
Description
RabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.15, 4.0.20, 4.1.11, and 4.2.6, mechanisms/1 applied list_to_atom/1 to every colon-delimited token in an attacker-controlled auth_mechanism value, permanently consuming Erlang VM atoms and allowing the node to be crashed with a large request. Exploitation requires the Shovel or Federation plugin to be in use, and setting auth_mechanism requires the policymaker tag. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3- cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*Range: >=3.13.0,<3.13.15
- Range: >=3.13.0,<3.13.15, >=4.0.0,<4.0.20, >=4.1.0,<4.1.11, >=4.2.0,<4.2.6
Patches
Vulnerability mechanics
References
2- github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-85jr-6rr2-j73rnvdVendor Advisory
- github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6nvdRelease Notes
News mentions
1- RabbitMQ: 25 Vulnerabilities Disclosed Together, Highlighting Auth, UI, and DoS RisksVypr Intelligence · Sep 25, 2026