{"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":0.34995,"scores":{"cna":8.2,"vendor":7.5},"ingestedAt":"2026-09-16T14:57:28.032Z","patched":["hardened_images"],"slug":"CVE-2026-77409","body":"## Overview\n\nRabbitMQ 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **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)\n- **RHSA-2026:68290** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:68290)","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":45.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}