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CVE-2026-77411— RabbitMQ amqp091-go: Protocol Desynchronization and Frame Injection via Integer Overflow in readLongstr

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 是一个 Go 语言的 AMQP 0.9.1 客户端。在版本 1.13.0 之前， 中的 函数在处理 AMQP longstr 类型时存在缺陷：当声明的 AMQP longstr 长度超过 时，该函数会返回一个空字符串和 错误，而不是返回 。该函数未读取已声明的字段字节，而 则将此操作视为成功，并从错误的偏移量继续解析。恶意或被攻陷的 broker 可以在 table 字段中提供一个过长的 longstr，从而导致后续 AMQP 解析失步，使攻击者控制的尾部字节被误读为后续字段或帧，进而破坏连接

CVSS 9.5 · Critical EPSS 0.52% · P45

Affected Version Matrix 1

VendorProduct Version RangeStatus
rabbitmq amqp091-go < 1.13.0 affected
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I. Basic Information for CVE-2026-77411

Vulnerability Information
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Vulnerability Title
RabbitMQ amqp091-go: Protocol Desynchronization and Frame Injection via Integer Overflow in readLongstr
Source: CVE Program / CVE List V5
Vulnerability Description
RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, readLongstr in read.go returns an empty string and a nil error when a declared AMQP longstr length exceeds 0x7FFFFFFF instead of returning ErrSyntax. The function leaves the declared field bytes unread, while readTable treats the operation as successful and continues parsing from the wrong offset. A malicious or compromised broker can provide an oversized longstr in a table field and desynchronize subsequent AMQP parsing, causing attacker-controlled trailing bytes to be interpreted as later fields or frames and disrupting connection integrity and availability. 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:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
对因果或异常条件的不恰当检查
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-2026-77411

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III. Intelligence Information for CVE-2026-77411

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Patches & Fixes for CVE-2026-77411 (2)

Vendor Advisories for CVE-2026-77411 (1)

Vendor Pages for CVE-2026-77411 (1)

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

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-2026-77409 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-754