CVE-2026-67222 (GCVE-0-2026-67222)

Vulnerability from cvelistv5 – Published: 2026-09-25 16:00 – Updated: 2026-09-28 13:46
VLAI
Title
RabbitMQ: list_to_atom on auth_mechanism URI tokens in amqp_client
Summary
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.
Severity
5.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-28 13:46 UTC
CWE
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
Vendor Product Version CPE status
rabbitmq rabbitmq-server Affected: >= 3.13.0, < 3.13.15
Affected: >= 4.0.0, < 4.0.20
Affected: >= 4.1.0, < 4.1.11
Affected: >= 4.2.0, < 4.2.6
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