Bug 2535499 (CVE-2026-77412)

Summary: CVE-2026-77412 github.com/rabbitmq/amqp091-go: RabbitMQ amqp091-go: Denial of Service via Malicious AMQP Field Length
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: aazores, cmah, dhanak, doconnor, drosa, dsimansk, eaguilar, ebaron, eglynn, gparvin, jbalunas, jjoyce, jmatsuok, jpretori, jschluet, jtolenti, kingland, lhh, mburns, mgarciac, mnovotny, pjindal, rhaigner, sausingh, tsze
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in RabbitMQ amqp091-go. A malicious or compromised broker can send a specially crafted AMQP (Advanced Message Queuing Protocol) message with a malformed field length. This can cause an integer overflow, leading to a runtime panic in the client process. Consequently, the client process terminates, resulting in a denial of service.
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Description OSIDB Bzimport 2026-09-16 14:54:36 UTC 
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.