CVE-2026-67229

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Source
https://cve.org/CVERecord?id=CVE-2026-67229
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67229.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-67229
Aliases
  • GHSA-ggrw-qm45-hwpv
Downstream
Published
2026-09-23T20:22:40Z
Modified
2026-09-25T03:48:37Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
RabbitMQ: Admin-only atom exhaustion: atomize_keys on vhost metadata
Details

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, add_vhost/2 calls rabbit_data_coercion:atomize_keys/1 (the unsafe variant using binary_to_atom) on the vhost metadata map. The 20 MB management body limit fits ~1M+ short keys. Admin-only. An administrator importing a crafted definitions file can crash the node in a single request: a vhosts entry with ~1M unique metadata keys exhausts the atom table during import. Preconditions include administrator tag. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-400"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67229.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "introduced":  "3.13.0"
                },
                {
                    "fixed":  "3.13.15"
                },
                {
                    "introduced":  "4.0.0"
                },
                {
                    "fixed":  "4.0.20"
                },
                {
                    "introduced":  "4.1.0"
                },
                {
                    "fixed":  "4.1.11"
                }
            ],
            "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
95c501fbad76c66156346cf364d158d6e30aa4d9
Fixed
8a56c37f099a7bf609a555de3f0ff8ed23964d20
Fixed
1929eeadf9b2bac12c5434fb56884ef27370580e
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "4.2.0"
        },
        {
            "fixed":  "4.2.6"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v4.*
v4.2.0
v4.2.1
v4.2.2
v4.2.3
v4.2.4
v4.2.5

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67229.json"