Vulnerability details
CVE-2026-77409
RabbitMQ amqp091-go: Denial of Service via Synchronous Event Channel Blocking
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.2High | 4.0 | CVEProject cvelistV5 (CNA) (GitHub_M) | 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 |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| rabbitmq | amqp091-go | < 1.13.0 | CVEProject cvelistV5 (CNA) |
References and advisories
4- https://github.com/rabbitmq/amqp091-go/security/advisories/GHSA-wxx3-cj7g-w73j x_refsource_CONFIRM
- https://github.com/rabbitmq/amqp091-go/pull/349 x_refsource_MISC
- https://github.com/rabbitmq/amqp091-go/commit/5b0ccbb8d7bc3dfa18129d9b0f9256d656809494 x_refsource_MISC
- https://github.com/rabbitmq/amqp091-go/releases/tag/v1.13.0 x_refsource_MISC
Details
- Published
- 2026-09-16
- Last updated
- 2026-09-18
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-770Allocation of Resources Without Limits or Throttling