{"id":"CVE-2026-77409","state":"PUBLISHED","title":"RabbitMQ amqp091-go: Denial of Service via Synchronous Event Channel Blocking","description":"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.","publishedAt":"2026-09-16T14:48:00.669Z","updatedAt":"2026-09-18T18:03:12.744Z","severity":{"score":8.2,"label":"High","version":"4.0","vector":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["rabbitmq amqp091-go"],"affected":[{"vendor":"rabbitmq","product":"amqp091-go","versions":[{"version":"< 1.13.0","status":"affected"}]}],"references":["https://github.com/rabbitmq/amqp091-go/security/advisories/GHSA-wxx3-cj7g-w73j","https://github.com/rabbitmq/amqp091-go/pull/349","https://github.com/rabbitmq/amqp091-go/commit/5b0ccbb8d7bc3dfa18129d9b0f9256d656809494","https://github.com/rabbitmq/amqp091-go/releases/tag/v1.13.0"],"weaknesses":["CWE-770"],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/77xxx/CVE-2026-77409.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-77409","state":"PUBLISHED","datePublished":"2026-09-16T14:48:00.669Z","dateUpdated":"2026-09-18T18:03:12.744Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-08-20T19:55:27.024Z"},"containers":{"cna":{"title":"RabbitMQ amqp091-go: Denial of Service via Synchronous Event Channel Blocking","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"rabbitmq","product":"amqp091-go","versions":[{"version":"< 1.13.0","status":"affected"}]}],"references":[{"url":"https://github.com/rabbitmq/amqp091-go/security/advisories/GHSA-wxx3-cj7g-w73j","name":"https://github.com/rabbitmq/amqp091-go/security/advisories/GHSA-wxx3-cj7g-w73j","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/rabbitmq/amqp091-go/pull/349","name":"https://github.com/rabbitmq/amqp091-go/pull/349","tags":["x_refsource_MISC"]},{"url":"https://github.com/rabbitmq/amqp091-go/commit/5b0ccbb8d7bc3dfa18129d9b0f9256d656809494","name":"https://github.com/rabbitmq/amqp091-go/commit/5b0ccbb8d7bc3dfa18129d9b0f9256d656809494","tags":["x_refsource_MISC"]},{"url":"https://github.com/rabbitmq/amqp091-go/releases/tag/v1.13.0","name":"https://github.com/rabbitmq/amqp091-go/releases/tag/v1.13.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"LOW","baseScore":8.2,"baseSeverity":"HIGH","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-770","lang":"en","description":"CWE-770: Allocation of Resources Without Limits or Throttling","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-16T14:48:00.669Z"},"source":{"advisory":"GHSA-wxx3-cj7g-w73j","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-18T18:02:58.536178Z","id":"CVE-2026-77409","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-18T18:03:12.744Z"}}]}}}