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CVE-2026-77409— RabbitMQ amqp091-go: Denial of Service via Synchronous Event Channel Blocking

Quick assessment

Affected
rabbitmq amqp091-go
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

RabbitMQ 的 amqp091-go 是一个 Go 语言的 AMQP 0.9.1 客户端。在 1.13.0 之前， 中的 、 中的 以及 中的 会同步地将发布者确认（publisher confirmations）、流控事件（flow-control events）、消费者取消（consumer cancellations）、退回消息（returned messages）、NotifyConfirm 事件以及连接阻塞通知（connection block notifications）发送到由应用程序提供的通道

CVSS 8.2 · High
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I. Basic Information for CVE-2026-77409

Vulnerability Information
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Vulnerability Title
RabbitMQ amqp091-go: Denial of Service via Synchronous Event Channel Blocking
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
rabbitmq amqp091-go < 1.13.0 -

II. Public POCs for CVE-2026-77409

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III. Intelligence Information for CVE-2026-77409

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Patches & Fixes for CVE-2026-77409 (2)

Vendor Advisories for CVE-2026-77409 (1)

Vendor Pages for CVE-2026-77409 (1)

Same Patch Batch · rabbitmq · 2026-09-16 · 11 CVEs total

CVE-2026-77411 9.5 CRITICAL RabbitMQ amqp091-go: Protocol Desynchronization and Frame Injection via Integer Overflow i
CVE-2026-77405 9.4 CRITICAL RabbitMQ amqp091-go: Missing Explicit TLS Minimum Version Configuration In URI Parser
CVE-2026-77408 9.1 CRITICAL RabbitMQ amqp091-go: Silent Data Truncation and State Corruption via Shortstr Integer Over
CVE-2026-77403 8.9 HIGH RabbitMQ amqp091-go: Denial of Service via Sub-Spec Frame Size Negotiation
CVE-2026-77410 8.9 HIGH RabbitMQ amqp091-go: Resource Exhaustion (OOM) via Unbounded Body Buffer Allocation
CVE-2026-77412 8.9 HIGH RabbitMQ amqp091-go: Denial of Service via Malicious Field Length in AMQP Client
CVE-2026-77404 8.7 HIGH RabbitMQ amqp091-go: Connection Configuration Overwrite via Unsanitized TLS Path Parameter
CVE-2026-75516 8.7 HIGH RabbitMQ Java client: Frame-level OOM: Math.min(maxInboundMessageBodySize, 0) defeats fram
CVE-2026-77406 8.2 HIGH RabbitMQ amqp091-go: Consumer Message Flooding via Signed-to-Unsigned Integer Casting in Q
CVE-2026-77407 7.0 HIGH RabbitMQ amqp091-go: Plaintext Credential Exposure via Exported PLAIN Authentication Struc

IV. Related Vulnerabilities

Same product: amqp091-go
Same vendor: rabbitmq
Same weakness: CWE-770

V. Comments for CVE-2026-77409

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