EMQX QoS 2 PUBLISH Packet emqx_persistent_session_ds.erl race condition_CVE-2026-8741

2.3 / 10

LOW

CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

Description

A vulnerability has been found in EMQX up to 6.2.0. This affects an unknown function of the file apps/emqx/src/emqx_persistent_session_ds.erl of the component QoS 2 PUBLISH Packet Handler. Such manipulation leads to race condition. The attack may be performed from remote. A high complexity level is associated with this attack. The exploitability is reported as difficult. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure.

Basic Information

ID CVE-2026-8741

Source VulDB

Published May 17, 2026 at 08:15

Affected Product

Vendor n/a

Product EMQX

Version 6.0

Affected Versions n/a EMQX 6.0
n/a EMQX 6.1
n/a EMQX 6.2.0

CWE Classification

CWE-362

References

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    "lastseen": "",
    "description": "A vulnerability has been found in EMQX up to 6.2.0. This affects an unknown function of the file apps/emqx/src/emqx_persistent_session_ds.erl of the component QoS 2 PUBLISH Packet Handler. Such manipulation leads to race condition. The attack may be performed from remote. A high complexity level is associated with this attack. The exploitability is reported as difficult. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure.",
    "published": "2026-05-17T08:15:08.625Z",
    "modified": "2026-05-17T08:15:08.625Z",
    "type": "cve",
    "title": "EMQX QoS 2 PUBLISH Packet emqx_persistent_session_ds.erl race condition",
    "source": "VulDB",
    "references": "https://vuldb.com/vuln/364329\nhttps://vuldb.com/vuln/364329/cti\nhttps://vuldb.com/submit/809931\nhttps://github.com/Pathfind-tama/Report_EMQX_MQTT\nhttps://github.com/Pathfind-tama/Report_EMQX_MQTT/blob/main/MQTT%20QoS%202%20Message%20Duplication%20in%20Persistent%20Sessions.md",
    "id": "CVE-2026-8741",
    "bulletinFamily": "",
    "cwe": [
        "CWE-362"
    ],
    "cvelist": null,
    "sourceData": "n/a EMQX 6.0\nn/a EMQX 6.1\nn/a EMQX 6.2.0",
    "sourceHref": "",
    "cvss": {
        "score": 2.3,
        "severity": "LOW",
        "vector": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
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        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
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        "confidentialityImpact": "",
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        "cvssV3": {
            "version": "",
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            "baseScore": 0,
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "EMQX",
    "version": "6.0",
    "vendor": "n/a",
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}