Resource exhaustion in RabbitMQ Server - #VU137232
Published: July 9, 2026
Vulnerability identifier: #VU137232
CSH Severity: Low
CVSS v4 BT: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: N/A
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in rabbit_pid_codec:decompose_from_binary/1 when decoding caller-supplied ETF-encoded reply-to queue names. A remote user can send specially crafted AMQP requests with unique node names to cause a denial of service.
The issue is reachable through queue names or routing keys beginning with amq.rabbitmq.reply-to. and can crash the entire Erlang VM across all vhosts and connections.
Affected software
RabbitMQ Server
Remediation
Install security update from vendor's website.
RabbitMQ Server - addressed in versions 4.2.7, 4.3.1