Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-67219— RabbitMQ: Consistent-hash exchange unbounded weight

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服务器。在 3.13.15、4.0.20、4.1.11、4.2.6 和 4.3.0 版本之前， 函数将路由键解析为整数权重 N，并使用 计算环位置。 仅检查 N >= 1，没有上限限制。由此生成的列表被存储在交换器（exchange）的 Khepri 记录中，在整个集群中复制，并在重启时重新加载。具有对一致性哈希交换器写入权限且对队列读取权限的用户可以创建一个绑定，其路由键（即哈希环权重）为一个任意大的整数。该代理服务器通过 分配一个包含这么多整数的列表，并将它持久化到所有集群

CVSS 6.0 · Medium EPSS 0.26% · P16
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-67219

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
RabbitMQ: Consistent-hash exchange unbounded weight
Source: CVE Program / CVE List V5
Vulnerability Description
RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, add_binding/3 parses the routing key as an integer weight N and computes ring positions with lists:seq(NextN0, NextN0 + N - 1). validate_binding/2 only checks N >= 1 , no upper bound. The resulting list is stored in the exchange's Khepri record, replicated cluster-wide, and reloaded on restart. A user with write permission on a consistent-hash exchange and read on a queue can create a binding whose routing key (the hash-ring weight) is an arbitrarily large integer. The broker allocates a list of that many integers via lists:seq/2 and persists it to Khepri across all cluster nodes , a single binding with weight 100000000 allocates ~800 MB on every node and survives restarts. Preconditions include rabbitmq_consistent_hash_exchange plugin enabled write permission on a consistent-hash exchange + read on a queue (standard binding perms). This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.
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
不加限制或调节的资源分配
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
rabbitmq rabbitmq-server >= 3.13.0, < 3.13.15 -

II. Public POCs for CVE-2026-67219

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-67219

请登录查看更多情报信息。

Vendor Pages for CVE-2026-67219 (1)

Other References for CVE-2026-67219 (2)

Same Patch Batch · rabbitmq · 2026-09-23 · 25 CVEs total

CVE-2026-67404 9.2 CRITICAL RabbitMQ: OAuth2 silent verify_none fallback for JWKS fetch
CVE-2026-67231 9.1 CRITICAL RabbitMQ: Trust-store whitelist by Issuer+Serial only
CVE-2026-66079 8.2 HIGH RabbitMQ: Pre-auth AMQP 1.0 array32 zero-width element DoS
CVE-2026-67232 8.2 HIGH RabbitMQ: Web-MQTT decompression bomb
CVE-2026-66070 7.6 HIGH RabbitMQ: CORS * reflects Origin with Allow-Credentials
CVE-2026-66077 7.3 HIGH RabbitMQ: Stored XSS via TLS peer-certificate DN in management UI
CVE-2026-67235 7.1 HIGH RabbitMQ: AMQP 0-9-1 body assembly never validates accumulated size
CVE-2026-67238 7.1 HIGH RabbitMQ: Atom-table exhaustion via reply-to queue name decoding
CVE-2026-67228 6.9 MEDIUM RabbitMQ: Atom exhaustion: to_atom on runtime-parameter component
CVE-2026-67229 6.9 MEDIUM RabbitMQ: Admin-only atom exhaustion: atomize_keys on vhost metadata
CVE-2026-66067 6.0 MEDIUM RabbitMQ: Stream protocol skips per vhost per user connection limits
CVE-2026-66074 6.0 MEDIUM RabbitMQ: ReDoS via management API ?name= filter
CVE-2026-66072 6.0 MEDIUM RabbitMQ: Atom table exhaustion via stream `chunk_selector`
CVE-2026-67220 6.0 MEDIUM RabbitMQ: JMS topic exchange erl_scan atom exhaustion
CVE-2026-66080 5.9 MEDIUM RabbitMQ: Super-stream partitions unbounded allocation
CVE-2026-67221 5.9 MEDIUM RabbitMQ: AMQP 1.0 shovel status exposes plaintext URI passwords
CVE-2026-66068 5.6 MEDIUM RabbitMQ: Shovel DEBUG log of full state exposes decrypted URIs
CVE-2026-67405 5.3 MEDIUM RabbitMQ: CSWSH on Web-STOMP / Web-MQTT (no Origin validation)
CVE-2026-66075 2.3 LOW RabbitMQ: Monitoring-tag user can restart federation links
CVE-2026-67240 2.3 LOW RabbitMQ: ReDoS via AMQP 1.0 SQL filter LIKE wildcard

Showing top 20 of 25 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: rabbitmq-server
Same vendor: rabbitmq
Same weakness: CWE-770

V. Comments for CVE-2026-67219

No comments yet

Leave a comment