CVE-2026-77406

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/rabbitmq/amqp091-go/commit/3b879e1d1d25b544e26b3bc3d7db3213203c0f3b
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

Configurations

No configuration.

History

16 Sep 2026, 15:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-16 15:17

Updated : 2026-09-16 19:17

NVD link : CVE-2026-77406

Mitre link : CVE-2026-77406

CVE.ORG link : CVE-2026-77406

JSON object : View

Products Affected

No product.

CWE

CWE-195

Signed to Unsigned Conversion Error

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