Patch Forecast
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CVE-2026-67419

RabbitMQ is a messaging and streaming broker

Risk score
50/100
CVSS
6.5 v3.1
Exploit chance (30 days)
0.4%
Published
25 Sep 2026

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What to know

What it is
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 materializ…
Affected
Broadcom Rabbitmq Server before 4.3.5
Fix
Upgrade Broadcom Rabbitmq Server to 4.3.5 or later.
Exploitation
Public proof of concept

Story map

Story map: Broadcom Rabbitmq ServerTHE FLAWSTHE FIXCVE-2026-67419RabbitMQ is a messaging andstreaming brokerCVSS 6.5 · EPSS 0%CVE-2026-67237RabbitMQ is a messaging andstreaming brokerCVSS 9.3 · EPSS 0%CVE-2026-66070RabbitMQ is a messaging andstreaming brokerCVSS 8.8 · EPSS 0%CVE-2026-67231RabbitMQ is a messaging andstreaming brokerCVSS 9.1 · EPSS 0%Upgrade Broadcom Rabbitmq…4.3.5 · 4.2.8 · 4.3.2 · 3.13.17 ·4.0.22 · 4.1.13or later on your release lineWho is exposedBroadcom Rabbitmq Serverbefore 4.2.8, 4.3.2AMBER · PATCH THIS WEEKBroadcomRabbitmq ServerRabbitMQ is a messaging andstreaming broker. From 4.2.0until 4.2.8 and 4.3.2,set_token_auth/2 inserted abearer token from theAuthorization header oraccess_token cookie into OAuth…Where it standsPublic proof of conceptCONNECTS TOSame weaknessDenial of service (CWE-407)71 other warnings in 30 days →Same productEarlier Broadcom Rabbitmq Server warnings45 in the last 90 days →
Story map: the flaws, the fix, how it unfolded and what it connects to. Boxes link to the record or article.

At a glance

Broadcom Rabbitmq Server: Amber, patch this week. RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.2.8 and 4.3.2, set_token_auth/2 inserted a bearer token from the Authorization header or access_token cookie into OAuth bootstrap JavaScript without escaping, allowing attacker-controlled token content to execute JavaScript in the management UI origin. T…

The flaws

  • CVE-2026-67419: RabbitMQ is a messaging and streaming broker (CVSS 6.5 · EPSS 0%)
  • CVE-2026-67237: RabbitMQ is a messaging and streaming broker (CVSS 9.3 · EPSS 0%)
  • CVE-2026-66070: RabbitMQ is a messaging and streaming broker (CVSS 8.8 · EPSS 0%)
  • CVE-2026-67231: RabbitMQ is a messaging and streaming broker (CVSS 9.1 · EPSS 0%)

The fix

Upgrade Broadcom Rabbitmq Server: 4.3.5 · 4.2.8 · 4.3.2 · 3.13.17 · 4.0.22 · 4.1.13 or later on your release line

Who is exposed: Broadcom Rabbitmq Server before 4.2.8, 4.3.2

Where it stands

  • Public proof of concept

Connects to

Why it is Yellow

  • CVSS 6.5 medium
  • Public exploit or proof of concept referenced

References

Original 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.

Last activity 25 Sep 2026. Patch Forecast updates every hour.