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CVE-2026-77403— RabbitMQ amqp091-go: Denial of Service via Sub-Spec Frame Size Negotiation

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 方法接受服务器通告的低于 AMQP 最小帧大小（4096 字节）的 FrameMax 值，因为连接协商循环未强制应用协议规定的最小值。因此，恶意或已被攻陷的 AMQP 代理可以通告一个极小的 FrameMax，导致客户端后续发布的消息被分片为数量过多的帧和写操作。这可能会消耗大量 CPU 资源，导致客户端或其宿主系统出现卡顿或停顿。该问题已在 1.13.0 版本中修复。

CVSS 8.9 · High EPSS 0.52% · P45

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
rabbitmq amqp091-go < 1.13.0 affected
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I. Basic Information for CVE-2026-77403

Vulnerability Information
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Vulnerability Title
RabbitMQ amqp091-go: Denial of Service via Sub-Spec Frame Size Negotiation
Source: CVE Program / CVE List V5
Vulnerability Description
RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, Connection.openTune in connection.go accepts a server-advertised FrameMax below the AMQP frameMinSize value of 4096 bytes because the connection negotiation loop does not enforce the protocol minimum. A malicious or compromised AMQP broker can therefore advertise an extremely small FrameMax, causing later client publications to be fragmented into excessive numbers of frames and write operations. This can consume CPU and stall the client or its host. 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:H
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-2026-77403

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III. Intelligence Information for CVE-2026-77403

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Patches & Fixes for CVE-2026-77403 (2)

Vendor Advisories for CVE-2026-77403 (1)

Vendor Pages for CVE-2026-77403 (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-2026-77410 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-2026-77409 8.2 HIGH RabbitMQ amqp091-go: Denial of Service via Synchronous Event Channel Blocking
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