RabbitMQ amqp091-go up to 1.12.x AMQP Field Reader read.go readField integer overflow

Summaryinfo

A vulnerability was found in RabbitMQ amqp091-go up to 1.12.x and classified as problematic. This affects the function readField of the file read.go of the component AMQP Field Reader. The manipulation results in integer overflow. This vulnerability is known as CVE-2026-77412. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in RabbitMQ amqp091-go up to 1.12.x. Affected is the function readField of the file read.go of the component AMQP Field Reader. The manipulation with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. This is going to have an impact on availability. CVE summarizes:

RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, readField in read.go reads the length of an AMQP byte-array field with type tag x into a signed int32 and passes the value directly to make when allocating the field buffer. A malicious or compromised broker can encode a value such as 0xFFFFFFFF, which becomes -1 and causes a len out of range runtime panic. The panic escapes the network reader goroutine and terminates the client process, including during connection.start server properties or message header table parsing. This issue is fixed in version 1.13.0.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-77412 since 08/20/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit.

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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