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.

References

https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-85jr-6rr2-j73r

https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-87143

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4

EPSS