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CVE-2026-67413— RabbitMQ: Authenticated RabbitMQ JMS Topic Selector Users Can Consume Broker CPU with an Unbounded LIKE Regular Expression

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 是一种消息传递和流式传输代理。在 4.0.0 至 4.0.23、4.1.14、4.2.9 和 4.3.3 版本中，可选插件 的 交换器接受由客户端控制的 绑定表达式，其中 评估器会将百分号（ ）和下划线（ ）通配符展开为重叠的 PCRE（Perl 兼容正则表达式）片段。这些片段通过原始调用 执行，且未设置匹配次数或递归深度限制。这使得拥有绑定和发布权限的已认证租户可以通过构造恶意的选择器表达式，消耗代理调度器的 CPU 资源，从而造成拒绝服务（DoS）漏洞。该问题已在版本 4.0.23、4.1.1

CVSS 6.0 · Medium EPSS 0.30% · P20
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I. Basic Information for CVE-2026-67413

Vulnerability Information
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Vulnerability Title
RabbitMQ: Authenticated RabbitMQ JMS Topic Selector Users Can Consume Broker CPU with an Unbounded LIKE Regular Expression
Source: CVE Program / CVE List V5
Vulnerability Description
RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.23, 4.1.14, 4.2.9, and 4.3.3, the optional rabbitmq_jms_topic_exchange plugin's x-jms-topic exchange accepted a client-controlled rjms_erlang_selector binding expression whose LIKE evaluator expanded percent and underscore wildcards into overlapping PCRE fragments. It executed those fragments with raw re:run/3 without match or recursion limits, allowing an authenticated tenant that can bind and publish to consume broker scheduler CPU and deny service with pathological selectors. This issue is fixed in versions 4.0.23, 4.1.14, 4.2.9, and 4.3.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1333
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
rabbitmq rabbitmq-server >= 4.2.0, < 4.2.9 -

II. Public POCs for CVE-2026-67413

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III. Intelligence Information for CVE-2026-67413

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Other References for CVE-2026-67413 (7)

Same Patch Batch · rabbitmq · 2026-09-25 · 28 CVEs total

CVE-2026-67236 8.2 HIGH RabbitMQ: Plaintext username:password stored in an insecure cookie after successful POST /
CVE-2026-67409 8.2 HIGH RabbitMQ: JWKS Fetch Ignores HTTP Response Status Code - Signing Key Destruction Causes Au
CVE-2026-67410 8.2 HIGH RabbitMQ: OAuth2 Client Secret Exposed via Unauthenticated JavaScript Endpoint
CVE-2026-67239 7.6 HIGH RabbitMQ: Stored XSS via TLS peer-certificate DN in stream-management UI
CVE-2026-67237 7.5 HIGH RabbitMQ: Reflected XSS via the OAuth bootstrap JS endpoint
CVE-2026-67408 7.1 HIGH RabbitMQ: Stream Management Super-Stream Binding Keys Allocation Allows Low-Privilege Node
CVE-2026-67419 7.1 HIGH RabbitMQ: Consecutive topic wildcards cause combinatorial routing work
CVE-2026-67226 6.9 MEDIUM RabbitMQ: Admin-only atom exhaustion: PUT /api/users tags list
CVE-2026-61837 6.3 MEDIUM RabbitMQ: AMQP 1.0 management `GET /bindings` exposes full binding topology to any authent
CVE-2026-67242 6.3 MEDIUM RabbitMQ: OAuth2 is_integer(Exp) guard skips token-expiry checks for float exp
CVE-2026-67230 6.3 MEDIUM RabbitMQ: Web-STOMP unbounded pre-auth accumulation
CVE-2026-67223 6.3 MEDIUM RabbitMQ: LDAP DN injection via unescaped substitution
CVE-2026-67225 6.3 MEDIUM RabbitMQ: Stream-protocol frame length never validated against frame_max
CVE-2026-67411 6.0 MEDIUM RabbitMQ: Web MQTT with PROXY Protocol enabled: a loopback-only user permission bypass
CVE-2026-66073 6.0 MEDIUM RabbitMQ: Atom table exhaustion via management API node field
CVE-2026-67412 6.0 MEDIUM RabbitMQ: Federation upstream skips vhost authorization allowing cross-vhost message acces
CVE-2026-66071 6.0 MEDIUM RabbitMQ: Atom exhaustion: OAuth2 JWT tag: scope values
CVE-2026-67415 5.9 MEDIUM RabbitMQ: Shovel Management Atom Exhaustion Allows Persistent Broker-Wide Denial of Servic
CVE-2026-67222 5.9 MEDIUM RabbitMQ: list_to_atom on auth_mechanism URI tokens in amqp_client
CVE-2026-67227 5.9 MEDIUM RabbitMQ: Atom exhaustion: to_atom on global-parameter :name

Showing top 20 of 28 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: rabbitmq-server
Same vendor: rabbitmq
Same weakness: CWE-1333

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