Description
RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, Connection.openTune in connection.go accepts a server-advertised FrameMax below the AMQP frameMinSize value of 4096 bytes because the connection negotiation loop does not enforce the protocol minimum. A malicious or compromised AMQP broker can therefore advertise an extremely small FrameMax, causing later client publications to be fragmented into excessive numbers of frames and write operations. This can consume CPU and stall the client or its host. This issue is fixed in version 1.13.0.
Published: 2026-09-16
Score: 8.9 High
EPSS: n/a
KEV: No
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Remediation

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History

Wed, 16 Sep 2026 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Rabbitmq
Rabbitmq amqp091-go
Vendors & Products Rabbitmq
Rabbitmq amqp091-go

Wed, 16 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 16 Sep 2026 14:45:00 +0000

Type Values Removed Values Added
Description RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, Connection.openTune in connection.go accepts a server-advertised FrameMax below the AMQP frameMinSize value of 4096 bytes because the connection negotiation loop does not enforce the protocol minimum. A malicious or compromised AMQP broker can therefore advertise an extremely small FrameMax, causing later client publications to be fragmented into excessive numbers of frames and write operations. This can consume CPU and stall the client or its host. This issue is fixed in version 1.13.0.
Title RabbitMQ amqp091-go: Denial of Service via Sub-Spec Frame Size Negotiation
Weaknesses CWE-770
References
Metrics cvssV4_0

{'score': 8.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H'}


Subscriptions

Rabbitmq Amqp091-go
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-16T15:43:19.632Z

Reserved: 2026-08-20T19:55:27.023Z

Link: CVE-2026-77403

cve-icon Vulnrichment

Updated: 2026-09-16T15:43:14.111Z

cve-icon NVD

Status : Received

Published: 2026-09-16T15:17:46.847

Modified: 2026-09-16T16:17:15.633

Link: CVE-2026-77403

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-16T16:30:07Z

Weaknesses