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CVE-2026-66070

8.8, high

RabbitMQ is a messaging and streaming broker

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
8.8, high high CVSS v3.1
EPSS, next 30 days
0.4% higher than 34.2% of scored CVEs
Exploitation
No public evidence
Published
23 Sept 202627 days ago

Description

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.17, 4.0.22, 4.1.13, and 4.2.6, match_origin/1 returned the bare reflected Origin and allowed credentials even when the wildcard "" was configured, so the response echoed the attacker's origin together with Access-Control-Allow-Credentials. The affected code is rabbit_mgmt_cors.erl. When the management plugin is configured with a wildcard CORS origin (cors_allow_origins = ""), the handler reflects the request Origin back in Access-Control-Allow-Origin and also sends Access-Control-Allow-Credentials: true. A malicious web page that a signed-in administrator visits can then use that administrator's cached HTTP Basic credentials to issue authenticated, state-changing requests to the management API. Preconditions include The management plugin is configured with the wildcard cors_allow_origins = "*", which is an explicit operator misconfiguration A target administrator has a cached HTTP Basic-auth session in the browser. This issue is fixed in versions 3.13.17, 4.0.22, 4.1.13, and 4.2.6.

Details

Vendor
Rabbitmq
Product
rabbitmq-server
Weakness
CWE-942 (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:H

References 2

Advisories 1

Other references 1

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-2026-66070 in your network?

This page tells you how dangerous CVE-2026-66070 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.

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    Find it before attackers do

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  • 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.