{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.13.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5b0ccbb8d7bc3dfa18129d9b0f9256d656809494"
            },
            {
              "fixed": "d26d57e952cc61554ea9c54bd676c8f40ed0d84d"
            }
          ],
          "repo": "https://github.com/rabbitmq/amqp091-go",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-wxx3-cj7g-w73j"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77409.json"
  },
  "details": "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.",
  "id": "CVE-2026-77409",
  "modified": "2026-09-20T11:30:40.482012538Z",
  "published": "2026-09-16T14:48:00.669Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/rabbitmq/amqp091-go/releases/tag/v1.13.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77409.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/rabbitmq/amqp091-go/security/advisories/GHSA-wxx3-cj7g-w73j"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-77409"
    },
    {
      "type": "FIX",
      "url": "https://github.com/rabbitmq/amqp091-go/commit/5b0ccbb8d7bc3dfa18129d9b0f9256d656809494"
    },
    {
      "type": "FIX",
      "url": "https://github.com/rabbitmq/amqp091-go/pull/349"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "RabbitMQ amqp091-go: Denial of Service via Synchronous Event Channel Blocking"
}