---
id: CVE-2026-77409
title: RabbitMQ amqp091-go is a Go AMQP 0.9.1 client
summary: >-
  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, c…
severity: high
cvss: 8.2
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L'
cwe:
  - CWE-770
vendor: rabbitmq
product: amqp091-go
affected:
  - amqp091-go < 1.13.0
published: '2026-09-16'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T18:17:14.950'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-77409'
references:
  - url: >-
      https://github.com/rabbitmq/amqp091-go/commit/5b0ccbb8d7bc3dfa18129d9b0f9256d656809494
    label: security-advisories@github.com
  - url: 'https://github.com/rabbitmq/amqp091-go/pull/349'
    label: security-advisories@github.com
  - url: 'https://github.com/rabbitmq/amqp091-go/releases/tag/v1.13.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/rabbitmq/amqp091-go/security/advisories/GHSA-wxx3-cj7g-w73j
    label: security-advisories@github.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-77409.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-77409'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2535494'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-77409'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-77409'
  - url: 'https://access.redhat.com/errata/RHSA-2026:68290'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-18T18:02:58.536178Z'
cvssSource: cna
epss: 0.00411
epssPercentile: 0.35098
scores:
  cna: 8.2
  vendor: 7.5
ingestedAt: '2026-09-16T14:57:28.032Z'
patched:
  - hardened_images
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Important · affected: Multicluster Global Hub, OpenShift Serverless, Red Hat Advanced Cluster Management for Kubernetes 2, Red Hat OpenStack Platform 18.0, Red Hat Quay 3 · no fix planned: Multicluster Global Hub, OpenShift Serverless, Red Hat Advanced Cluster Management for Kubernetes 2, Red Hat OpenStack Platform 18.0, … · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-77409.json)
- **RHSA-2026:68290** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:68290)