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CVE-2026-57217— RabbitMQ: Topic authorization can lead to cross-tenant routing-key bypass

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 3.13.15之前版本、4.0.21之前版本、4.1.11之前版本和4.2.6之前版本存在授权问题漏洞，该漏洞源于topic授权问题，在元数据存储失败期间Khepri的topic权限查找错误可崩溃为undefined，内部后端将其视为允许，从而导致受限的topic写入和绑定。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.35% · P26

Possible ATT&CK Techniques 1 AI

T1098 · Account Manipulation

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-2026-57217

Vulnerability Information
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Vulnerability Title
RabbitMQ: Topic authorization can lead to cross-tenant routing-key bypass
Source: CVE Program / CVE List V5
Vulnerability Description
RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.21, 4.1.11, and 4.2.6, RabbitMQ topic authorization can allow restricted topic writes and binds during metadata-store failures because topic-permission lookup errors from Khepri can collapse to undefined, which the internal backend treats as allow. This issue is fixed in versions 3.13.15, 4.0.21, 4.1.11, and 4.2.6.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
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 3.13.15之前版本、4.0.21之前版本、4.1.11之前版本和4.2.6之前版本存在授权问题漏洞，该漏洞源于topic授权问题，在元数据存储失败期间Khepri的topic权限查找错误可崩溃为undefined，内部后端将其视为允许，从而导致受限的topic写入和绑定。
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-2026-57217

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III. Intelligence Information for CVE-2026-57217

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Patches & Fixes for CVE-2026-57217 (4)

Vendor Advisories for CVE-2026-57217 (1)

Vendor Pages for CVE-2026-57217 (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-2026-57216 6.8 MEDIUM RabbitMQ: AMQP 1.0, AMQP 0-9-1, Stream Protocol loopback enforcement can lead to remote gu
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-2026-57212 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-863

V. Comments for CVE-2026-57217

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