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CVE-2026-67405

8.1, high

RabbitMQ is a messaging and streaming broker

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
8.1, high high CVSS v3.1
EPSS, next 30 days
0.1% higher than 2% of scored CVEs
Exploitation
No public evidence
Published
23 Sept 202627 days ago

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, Neither the Web-MQTT handler (deps/rabbitmq_web_mqtt/src/rabbit_web_mqtt_handler.erl:104) nor the Web-STOMP handler (deps/rabbitmq_web_stomp/src/rabbit_web_stomp_handler.erl:102) validates the Origin header on the WebSocket upgrade. Under ssl_cert_login=true, the browser presents the client certificate automatically, so an attacker's JavaScript running in the victim's browser can authenticate as the victim. Preconditions include The non-default configuration use_http_auth=true (Web-STOMP) or ssl_cert_login=true (both plugins) must be enabled. The issue is harmless under the default in-band CONNECT credential configuration.. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.

Details

Vendor
Rabbitmq
Product
rabbitmq-server
Weakness
CWE-1385 (opens in a new tab)
Status
Analyzed
Updated
19 Oct 2026
Assigner
security-advisories@github.com

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

References 3

Advisories 1

Other references 2

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Rabbitmq CVEs

Every Rabbitmq CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-106121 The RabbitMQ Java client library allows Java and JVM-based applications to connect to and interact with RabbitMQ nodes EPSS 0.5% 7.5, high
  • CVE-2026-106122 The RabbitMQ Java client library allows Java and JVM-based applications to connect to and interact with RabbitMQ nodes EPSS 0.5% 7.5, high
  • CVE-2026-67410 rabbitmq-server Exposure of Sensitive Information Vulnerability EPSS 0.4% 7.1, high
  • CVE-2026-67411 rabbitmq-server Incorrect Authorization Vulnerability EPSS 0.3% 7.1, high
  • CVE-2026-67412 rabbitmq-server Missing Authorization Vulnerability EPSS 0.3% 7.1, high
  • CVE-2026-67223 RabbitMQ is a messaging and streaming broker EPSS 0.4% 7.1, high
  • CVE-2026-67407 rabbitmq-server Missing Authorization Vulnerability EPSS 0.2% 7.1, high
  • CVE-2026-67233 rabbitmq-server Missing Authorization Vulnerability EPSS 0.3% 7.1, high

Beyond this page

Is CVE-2026-67405 in your network?

This page tells you how dangerous CVE-2026-67405 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-67405 comes with the devices to patch.

    Learn more about EXYS7600 OCELOT

  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 20 Oct 2026, not the live upstream state.