RabbitMQ amqp091-go Client Vulnerability in Channel.Qos Processing
CVE-2026-77406

8.2HIGH

Key Information:

Vendor

RabbitMQ

Status
AMQp091-go
Vendor
CVE Published:
16 September 2026

What is CVE-2026-77406?

The RabbitMQ amqp091-go client prior to version 1.13.0 contains a vulnerability in the Channel.Qos method. The method improperly processes negative prefetchCount and prefetchSize values, converting them directly to unsigned integers without validation. This lack of input validation can allow applications to inadvertently request excessively high prefetch limits, potentially leading to memory exhaustion and disrupted message processing if the client configuration is not managed securely. This issue has been addressed in version 1.13.0.

Affected Version(s)

amqp091-go < 1.13.0

References

https://github.com/rabbitmq/amqp091-go/security/advisorie...
x_refsource_CONFIRM
https://github.com/rabbitmq/amqp091-go/pull/351
x_refsource_MISC
https://github.com/rabbitmq/amqp091-go/commit/3b879e1d1d2...
x_refsource_MISC

CVSS V4

Score:
8.2
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.