CVE-2026-67418

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Source
https://cve.org/CVERecord?id=CVE-2026-67418
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67418.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-67418
Aliases
  • GHSA-jv99-v328-mvmm
Downstream
Published
2026-10-14T16:07:29Z
Modified
2026-10-15T02:47:41Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
RabbitMQ MQTT 5: inapplicable PUBLISH property disconnects matching subscribers
Details

RabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.19, 4.0.24, 4.1.15, 4.2.10, and 4.3.5, the MQTT 5 parser in deps/rabbitmq_mqtt/src/rabbit_mqtt_packet.erl accepts Request-Problem-Information on PUBLISH packets even though the property is valid only for CONNECT. An authenticated publisher with topic write permission can cause the broker to store and route that inapplicable property to a separately authenticated matching subscriber. When the subscriber path serializes the outbound PUBLISH, serialise_prop/2 has no matching clause, and the uncontained function_clause exception closes the victim MQTT or Web MQTT connection. The publisher connection and broker remain available, and queued replay, retained-message persistence, and broker-wide denial of service were not established. This issue is fixed in versions 3.13.19, 4.0.24, 4.1.15, 4.2.10, and 4.3.5.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-1286",
        "CWE-248"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67418.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "introduced":  "3.13.0"
                },
                {
                    "fixed":  "3.13.19"
                },
                {
                    "introduced":  "4.0.0"
                },
                {
                    "fixed":  "4.0.24"
                },
                {
                    "introduced":  "4.1.0"
                },
                {
                    "fixed":  "4.1.15"
                },
                {
                    "introduced":  "4.2.0"
                },
                {
                    "fixed":  "4.2.10"
                }
            ],
            "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
0dde27bfdd1984ff7e157226fd97656854a7f359
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "4.3.0"
        },
        {
            "fixed":  "4.3.5"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

v4.*
v4.3.0
v4.3.1
v4.3.2
v4.3.3
v4.3.4

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67418.json"