Vulnerability Description
RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, Channel.Qos in channel.go accepts negative prefetchCount and prefetchSize integers and casts them directly to uint16 and uint32 fields in the basic.qos method because validateQos is absent. Values such as -1 therefore wrap to 65535 or 4294967295 instead of being rejected. An application that permits untrusted configuration of these Qos values can unintentionally request extremely large prefetch limits, allowing a broker to deliver enough queued messages to exhaust client memory and disrupt processing. This issue is fixed in version 1.13.0.
Related Weaknesses (CWE)
References
- https://github.com/rabbitmq/amqp091-go/commit/3b879e1d1d25b544e26b3bc3d7db321320
- https://github.com/rabbitmq/amqp091-go/pull/351
- https://github.com/rabbitmq/amqp091-go/releases/tag/v1.13.0
- https://github.com/rabbitmq/amqp091-go/security/advisories/GHSA-rm6m-hrcw-jw33
FAQ
What is CVE-2026-77406?
CVE-2026-77406 is a documented vulnerability. RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, Channel.Qos in channel.go accepts negative prefetchCount and prefetchSize integers and casts them directly to uint16 and uint32 fields i...
How severe is CVE-2026-77406?
CVSS scoring is not yet available for CVE-2026-77406. Check NVD for updates.
Is there a patch for CVE-2026-77406?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.