Vulnerability 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.
Related Weaknesses (CWE)
References
- https://github.com/rabbitmq/amqp091-go/commit/2e0a919b89f337dbf58db2bb34ab206dac
- https://github.com/rabbitmq/amqp091-go/pull/353
- https://github.com/rabbitmq/amqp091-go/releases/tag/v1.13.0
- https://github.com/rabbitmq/amqp091-go/security/advisories/GHSA-xwwf-m8fg-p9q2
FAQ
What is CVE-2026-77403?
CVE-2026-77403 is a documented vulnerability. 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 co...
How severe is CVE-2026-77403?
CVSS scoring is not yet available for CVE-2026-77403. Check NVD for updates.
Is there a patch for CVE-2026-77403?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.