rabbitmq amqp091-go up to 1.12.x Publisher Confirmation channel.go resource consumption

Summaryinfo

A vulnerability classified as problematic has been found in rabbitmq amqp091-go up to 1.12.x. This affects the function Channel.dispatch/confirm.confirm/Connection.dispatch0 of the file channel.go of the component Publisher Confirmation Handler. This manipulation causes resource consumption. This vulnerability is registered as CVE-2026-77409. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in rabbitmq amqp091-go up to 1.12.x and classified as problematic. Affected by this vulnerability is the function Channel.dispatch/confirm.confirm/Connection.dispatch0 of the file channel.go of the component Publisher Confirmation Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. The summary by CVE is:

RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, Channel.dispatch in channel.go, confirms.confirm in confirms.go, and Connection.dispatch0 in connection.go synchronously send publisher confirmations, flow-control events, consumer cancellations, returned messages, including NotifyConfirm events and connection block notifications, to application-provided channels. If a listener channel is unbuffered, full, or not drained promptly, the sole reader goroutine blocks and stops processing frames, acknowledgments, deliveries, and heartbeats. Broker-driven event bursts can therefore cause connection stalls, missed heartbeats, deadlocks, and disconnection. This issue is fixed in version 1.13.0.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-77409 since 08/20/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 1.13.0 eliminates this vulnerability.

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Productinfo

Vendor

• rabbitmq

Name

• amqp091-go

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12

Website

• Product: https://github.com/rabbitmq/amqp091-go/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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