CVE-2026-67419— RabbitMQ: Consecutive topic wildcards cause combinatorial routing work
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 是一个消息和流式代理系统。在 4.3.5 版本之前，拥有绑定队列到主题交换器并发布消息权限的用户，可以在绑定键中使用连续的 通配符，使得主题匹配器在没有记忆化的情况下重新访问相同的 trie 节点和路由键后缀状态。这种匹配器会在去重之前生成重复的目标地址，从而导致组合式的 CPU 计算和内存压力，可能干扰所有租户的路由功能。该漏洞已在 4.3.5 版本中得到修复。
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I. Basic Information for CVE-2026-67419
Vulnerability Information
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Vulnerability Title
RabbitMQ: Consecutive topic wildcards cause combinatorial routing work
Source: CVE Program / CVE List V5
Vulnerability Description
RabbitMQ is a messaging and streaming broker. Prior to 4.3.5, an authenticated user who can bind a queue to a topic exchange and publish to it can use consecutive # segments in a binding key to make both topic matchers revisit the same trie-node and routing-key-suffix states without memoization. The matcher materializes duplicate destinations before deduplication, causing combinatorial CPU work and memory pressure that can disrupt routing for all tenants. This vulnerability is fixed in 4.3.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
算法复杂性
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| rabbitmq | rabbitmq-server | < 4.3.5 | - |
|
II. Public POCs for CVE-2026-67419
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-67419 (3)
-
https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.5 x_refsource_MISC
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-2026-67226 | 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-2026-66071 | 6.0 MEDIUM | RabbitMQ: Atom exhaustion: OAuth2 JWT tag: scope values |
| CVE-2026-67413 | 6.0 MEDIUM | RabbitMQ: Authenticated RabbitMQ JMS Topic Selector Users Can Consume Broker CPU with an U |
| CVE-2026-67412 | 6.0 MEDIUM | RabbitMQ: Federation upstream skips vhost authorization allowing cross-vhost message acces |
| CVE-2026-66073 | 6.0 MEDIUM | RabbitMQ: Atom table exhaustion via management API node field |
| CVE-2026-67411 | 6.0 MEDIUM | RabbitMQ: Web MQTT with PROXY Protocol enabled: a loopback-only user permission bypass |
| 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 |
| CVE-2026-67415 | 5.9 MEDIUM | RabbitMQ: Shovel Management Atom Exhaustion Allows Persistent Broker-Wide Denial of Servic |
Showing top 20 of 28 CVEs. View all on vendor page → →
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