Memory Pressure Vulnerability in RabbitMQ Messaging Broker
CVE-2026-67225

6.3MEDIUM

Key Information:

Vendor

RabbitMQ

Status
RabbitMQ-server
Vendor
CVE Published:
25 September 2026

What is CVE-2026-67225?

A vulnerability exists in RabbitMQ where the stream protocol improperly handles the FrameMax value during the Tune handshake. Due to this flaw, a remote attacker can exploit the system by declaring oversized frames, leading to excessive memory pressure and potential denial of service. This vulnerability affects several RabbitMQ versions, but updates are available to address the issue in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.

Affected Version(s)

rabbitmq-server >= 3.13.0, < 3.13.15 < 3.13.0, 3.13.15

rabbitmq-server >= 4.0.0, < 4.0.20 < 4.0.0, 4.0.20

rabbitmq-server >= 4.1.0, < 4.1.11 < 4.1.0, 4.1.11

References

https://github.com/rabbitmq/rabbitmq-server/security/advi...
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https://github.com/rabbitmq/rabbitmq-server/releases/tag/...
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CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.