Allocation of Resources Without Limits or Throttling in RabbitMQ Server - CVE-2026-67225
Published: July 9, 2026 / Updated: September 28, 2026
Vulnerability identifier: #VU137239
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-67225
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in rabbit_stream_core when processing inbound stream-protocol frames before authentication. A remote attacker can send a frame with a declared size exceeding the negotiated frame_max to cause a denial of service.
The stream plugin must be enabled.
Affected software
RabbitMQ Server
How to mitigate CVE-2026-67225
Install security update from vendor's website.
RabbitMQ Server - addressed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6