CVE-2026-66070
published 2026-09-23CVE-2026-66070: 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…
PriorityP354high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
0.37%
29.9th percentile
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.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| broadcom | rabbitmq_server | >= 3.13.0 < 3.13.17 | 3.13.17 |
| broadcom | rabbitmq_server | >= 4.0.0 < 4.0.22 | 4.0.22 |
| broadcom | rabbitmq_server | >= 4.1.0 < 4.1.13 | 4.1.13 |
| broadcom | rabbitmq_server | >= 4.2.0 < 4.2.6 | 4.2.6 |
| rabbitmq | rabbitmq-server | — | — |
| rabbitmq | rabbitmq-server | — | — |
| rabbitmq | rabbitmq-server | — | — |
| rabbitmq | rabbitmq-server | — | — |
| ubuntu | rabbitmq-server | — | — |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvdv4.07.6HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vendor_redhat7.6HIGH
vendor_ubuntu7.6HIGH
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Ubuntu
RabbitMQ Server vulnerabilities
vendor_ubuntu·2026-10-15·CVSS 7.6
CVE-2026-67404 [HIGH] RabbitMQ Server vulnerabilities
Title: RabbitMQ Server vulnerabilities
Summary: Several security issues were fixed in RabbitMQ Server.
It was discovered that RabbitMQ Server incorrectly handled CORS wildcard
origin configuration. An attacker could possibly use this issue to cause
a cross-site request forgery attack. This issue only affected Ubuntu 18.04
LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04
LTS. (CVE-2026-66070)
It was discovered that RabbitMQ Server incorrectly handled TLS
peer-certificate DNs in the management UI. An attacker could possibly use
this issue to cause a cross-site scripting attack. (CVE-2026-66077)
It was discovered that RabbitMQ Server incorrectly handled AMQP 1.0 arrays
with zero-width element constructors. An attacker could possibly use this
issue to cause a den
Red Hat
rabbitmq-server: RabbitMQ: Cross-Origin Resource Sharing (CORS) misconfiguration allows unauthorized actions
vendor_redhat·2026-09-23·CVSS 7.6
CVE-2026-66070 [HIGH] CWE-942 rabbitmq-server: RabbitMQ: Cross-Origin Resource Sharing (CORS) misconfiguration allows unauthorized actions
rabbitmq-server: RabbitMQ: Cross-Origin Resource Sharing (CORS) misconfiguration allows unauthorized actions
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
VulDB
RabbitMQ up to 3.13.16/4.0.21/4.1.12/4.2.5 CORS rabbit_mgmt_cors.erl match_origin cross-domain policy
vuldb·2026-09-23·CVSS 7.6
CVE-2026-66070 [HIGH] RabbitMQ up to 3.13.16/4.0.21/4.1.12/4.2.5 CORS rabbit_mgmt_cors.erl match_origin cross-domain policy
A vulnerability, which was classified as problematic, has been found in RabbitMQ up to 3.13.16/4.0.21/4.1.12/4.2.5. The impacted element is the function match_origin of the file rabbit_mgmt_cors.erl of the component CORS Handler. This manipulation causes permissive cross-domain policy with untrusted domains.
This vulnerability is tracked as CVE-2026-66070. The attack is possible to be carried out remotely. No exploit exists.
It is advisable to upgrade the affected component.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-66070 rabbitmq-server: RabbitMQ: Cross-Origin Resource Sharing (CORS) misconfiguration allows unauthorized actions [fedora-all]
bugzilla·2026-09-24·CVSS 7.6
CVE-2026-66070 [HIGH] CVE-2026-66070 rabbitmq-server: RabbitMQ: Cross-Origin Resource Sharing (CORS) misconfiguration allows unauthorized actions [fedora-all]
CVE-2026-66070 rabbitmq-server: RabbitMQ: Cross-Origin Resource Sharing (CORS) misconfiguration allows unauthorized actions [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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_orig
Bugzilla
CVE-2026-66070 rabbitmq-server: RabbitMQ: Cross-Origin Resource Sharing (CORS) misconfiguration allows unauthorized actions
bugzilla·2026-09-23·CVSS 7.6
CVE-2026-66070 [HIGH] CVE-2026-66070 rabbitmq-server: RabbitMQ: Cross-Origin Resource Sharing (CORS) misconfiguration allows unauthorized actions
CVE-2026-66070 rabbitmq-server: RabbitMQ: Cross-Origin Resource Sharing (CORS) misconfiguration allows unauthorized actions
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 cac
2026-09-23
Published