CVE-2026-67412

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Source
https://cve.org/CVERecord?id=CVE-2026-67412
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67412.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-67412
Aliases
  • GHSA-42pc-678q-v8qj
Downstream
Published
2026-09-25T16:20:13Z
Modified
2026-09-26T03:46:54Z
Severity
  • 6.0 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N CVSS Calculator
Summary
RabbitMQ: Federation upstream skips vhost authorization allowing cross-vhost message access
Details

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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-862"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67412.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "introduced":  "4.1.0"
                },
                {
                    "fixed":  "4.1.14"
                },
                {
                    "introduced":  "4.0.0"
                },
                {
                    "fixed":  "4.0.24"
                },
                {
                    "introduced":  "3.13.0"
                },
                {
                    "fixed":  "3.13.18"
                }
            ],
            "source":  "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/rabbitmq/rabbitmq-server

Affected ranges

Type
GIT
Repo
https://github.com/rabbitmq/rabbitmq-server
Events
Introduced
1929eeadf9b2bac12c5434fb56884ef27370580e
Fixed
1d284b2d2a1e2f845ad22b0d5ee38ec372d50802
Introduced
95c501fbad76c66156346cf364d158d6e30aa4d9
Fixed
47d6d6457c7d1a440daed643cb7d76bba313e79c
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "4.3.0"
        },
        {
            "fixed":  "4.3.3"
        },
        {
            "introduced":  "4.2.0"
        },
        {
            "fixed":  "4.2.9"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

v4.*
v4.2.0
v4.2.1
v4.2.2
v4.2.3
v4.2.4
v4.2.5
v4.2.6
v4.2.7
v4.2.8
v4.3.0
v4.3.1
v4.3.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67412.json"