CVE-2026-102464

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Source
https://cve.org/CVERecord?id=CVE-2026-102464
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-102464.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-102464
Aliases
  • GHSA-46xj-5735-6qrp
Published
2026-10-15T08:26:02Z
Modified
2026-10-17T02:47:50Z
Severity
  • 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
[none]
Details

In Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the Eclipse Vert.x MQTT (vertx-mqtt) MqttClient stores every inbound QoS 2 PUBLISH message received from the broker in an internal map (qos2inbound) while awaiting the corresponding PUBREL packet to complete the QoS 2 handshake. This map has no size limit; the maxInflightQueue option is enforced only on the outbound publish path and does not constrain inbound message retention.

A malicious or compromised MQTT broker can exploit this by sending QoS 2 PUBLISH messages with distinct packet identifiers and withholding the PUBREL responses. Each incomplete handshake causes the client to retain the full publish message (topic, payload, and metadata) indefinitely, leading to unbounded memory growth in the Vert.x process. This can degrade the MQTT-consuming application or cause out-of-memory termination.

The impacted component is io.vertx:vertx-mqtt.

Database specific 
{
    "cna_assigner":  "eclipse",
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102464.json"
}
References

Affected packages

Git / github.com/vert-x3/vertx-mqtt

Affected ranges

Type
GIT
Repo
https://github.com/vert-x3/vertx-mqtt
Events
Introduced
9b67d6c832f72920ff207af372d64e747b775113
Last Affected
126eeea16491bb3dc7197639ebcd506634032318
Introduced
7d62e924612f5e7ddf62af4219970da3d176f650
Last Affected
5b92ff1789b012b003fbf65671343d214c5c4813
Introduced
7884d5f9bde04fc6d27894b9e9a71212a559faa9
Last Affected
9dc2ebf6dc5ebf24904cb0b26257afe0d8429ab6
Introduced
e65e01c31b64d68aa6d92acdca1274b10a06ed94
Last Affected
e65e01c31b64d68aa6d92acdca1274b10a06ed94
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "4.0.0"
        },
        {
            "last_affected":  "4.5.34"
        },
        {
            "introduced":  "5.0.0"
        },
        {
            "last_affected":  "5.0.12"
        },
        {
            "introduced":  "5.1.0"
        },
        {
            "last_affected":  "5.1.9"
        },
        {
            "introduced":  "5.2.0"
        },
        {
            "last_affected":  "5.2.0"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

4.*
4.0.0
4.0.1
4.0.2
4.0.3
4.1.0
4.1.0.Beta1
4.1.0.CR1
4.1.0.CR2
4.1.1
4.2.0
4.2.0.Beta1
4.2.0.CR1
4.2.1
4.2.2
4.2.3
4.2.4
4.2.5
4.3.0
4.3.1
4.3.2
4.3.3
4.3.4
4.3.5
4.4.0
4.4.1
4.4.2
4.4.3
4.4.4
4.4.5
4.5.0
4.5.1
4.5.10
4.5.11
4.5.12
4.5.13
4.5.14
4.5.15
4.5.16
4.5.17
4.5.18
4.5.19
4.5.2
4.5.20
4.5.21
4.5.22
4.5.23
4.5.24
4.5.25
4.5.26
4.5.27
4.5.28
4.5.29
4.5.3
4.5.30
4.5.31
4.5.32
4.5.33
4.5.34
4.5.4
4.5.5
4.5.6
4.5.7
4.5.8
4.5.9
5.*
5.0.0
5.0.1
5.0.10
5.0.11
5.0.12
5.0.2
5.0.3
5.0.4
5.0.5
5.0.6
5.0.7
5.0.8
5.0.9
5.2.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-102464.json"