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CVE-2026-57216— RabbitMQ: AMQP 1.0, AMQP 0-9-1, Stream Protocol loopback enforcement can lead to remote guest sessions due to listener-address loopback checks

Quick assessment

Affected
rabbitmq rabbitmq-server
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 rabbitmq-server是RabbitMQ组织的消息队列中间件。 rabbitmq-server存在授权问题漏洞，该漏洞源于AMQP 0-9-1、AMQP 1.0和Stream Protocol身份验证存在逻辑问题，其中回环检查使用监听端套接字地址而非实际客户端源地址，导致当流量通过可信的PROXY协议路径时，允许回环限制用户远程连接。以下版本受到影响：3.13.15之前版本、4.0.20之前版本、4.1.11之前版本和4.2.6之前版本。

CVSS 6.8 · Medium EPSS 0.50% · P41

Possible ATT&CK Techniques 1 AI

T1133 · External Remote Services

Affected Version Matrix 4

VendorProduct Version RangeStatus
rabbitmq rabbitmq-server >= 4.2.0, < 4.2.6 affected
>= 4.1.0, < 4.1.11 affected
>= 4.0.0, < 4.0.21 affected
>= 3.13.0, < 3.13.15 affected
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I. Basic Information for CVE-2026-57216

Vulnerability Information
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Vulnerability Title
RabbitMQ: AMQP 1.0, AMQP 0-9-1, Stream Protocol loopback enforcement can lead to remote guest sessions due to listener-address loopback checks
Source: CVE Program / CVE List V5
Vulnerability Description
RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, AMQP 0-9-1, AMQP 1.0, and Stream Protocol authentication can allow a loopback-restricted user such as guest to connect remotely when traffic is accepted through a trusted PROXY-protocol path and the backend listener is loopback-bound because the loopback check uses the listener-side socket address instead of the real client source. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
rabbitmq-server 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
RabbitMQ rabbitmq-server是RabbitMQ组织的消息队列中间件。 rabbitmq-server存在授权问题漏洞，该漏洞源于AMQP 0-9-1、AMQP 1.0和Stream Protocol身份验证存在逻辑问题，其中回环检查使用监听端套接字地址而非实际客户端源地址，导致当流量通过可信的PROXY协议路径时，允许回环限制用户远程连接。以下版本受到影响：3.13.15之前版本、4.0.20之前版本、4.1.11之前版本和4.2.6之前版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
rabbitmq rabbitmq-server >= 4.2.0, < 4.2.6 -

II. Public POCs for CVE-2026-57216

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III. Intelligence Information for CVE-2026-57216

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Patches & Fixes for CVE-2026-57216 (3)

Vendor Advisories for CVE-2026-57216 (1)

Vendor Pages for CVE-2026-57216 (1)

Same Patch Batch · rabbitmq · 2026-07-10 · 11 CVEs total

CVE-2026-57219 8.7 HIGH RabbitMQ: Unauthenticated disclosure of OAuth client credentials via an HTTP API endpoint
CVE-2026-57220 7.5 HIGH RabbitMQ: Stream listener does not enforce configured frame-size limit during authenticati
CVE-2026-57211 6.5 MEDIUM RabbitMQ: UNC SSRF affecting the management UI on Windows
CVE-2026-57218 RabbitMQ: AMQP 0-9-1 in combination with OAuth 2: consumer persistence can lead to post-re
CVE-2026-57214 RabbitMQ: Stored XSS in RabbitMQ management UI
CVE-2026-57213 RabbitMQ: Stored XSS federation management plugin via unsanitized consumer_tag rendering
CVE-2026-57217 RabbitMQ: Topic authorization can lead to cross-tenant routing-key bypass
CVE-2026-57212 RabbitMQ management HTTP API accepts request bodies larger than configured max_http_body_s
CVE-2026-57215 RabbitMQ: Direct-reply-to binding persistence can lead to unauthorized reply-channel injec
CVE-2026-57221 RabbitMQ: Passive queue/exchange declaration bypasses authorization checks, leaking queue

IV. Related Vulnerabilities

Same product: rabbitmq-server
Same vendor: rabbitmq
Same weakness: CWE-287

V. Comments for CVE-2026-57216

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