RabbitMQ: Federation upstream skips vhost authorization allowing cross-vhost message access
RabbitMQ is a messaging and streaming broker. From 3.13.0 until 4.3.3, 4.2.9 , 4.1.14, 4.0.24, and 3.13.18, Federation upstream in RabbitMQ skips vhost authorization allowing cross-vhost message access. what the bug lets you do. A policymaker on one vhost reads and drains messages out of another vhost it has no permission on. With the default ack-mode the source messages are consumed (deleted), not copied. Why that should not 1. Federation validates the upstream URI without any vhost-access Cross-vhost message read/drain from a per-vhost policymaker, breaking vhost tenancy This issue is fixed in versions 4.3.3, 4.2.9 , 4.1.14, 4.0.24, and 3.13.18.
CVE-2026-67412
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-67412
rabbitmq-server
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "rabbitmq",
"product": "rabbitmq-server",
"versions": [
{
"status": "affected",
"version": ">= 4.3.0, < 4.3.3"
},
{
"status": "affected",
"version": ">= 4.2.0, < 4.2.9"
},
{
"status": "affected",
"version": ">= 4.1.0, < 4.1.14"
},
{
"status": "affected",
"version": ">= 4.0.0, < 4.0.24"
},
{
"status": "affected",
"version": ">= 3.13.0, < 3.13.18"
}
]
}
]- Related CVEs
- CVE-2026-67412
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #2176 · Revision 1
- Added to Heist Feed
- Publisher date