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.
History

Mon, 18 May 2026 19:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sun, 17 May 2026 09:00:00 +0000

Type Values Removed Values Added
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.
Title EMQX QoS 2 PUBLISH Packet emqx_persistent_session_ds.erl race condition
First Time appeared Emqx
Emqx emqx
Weaknesses CWE-362
CPEs cpe:2.3:a:emqx:emqx:*:*:*:*:*:*:*:*
Vendors & Products Emqx
Emqx emqx
References
Metrics cvssV2_0

{'score': 2.1, 'vector': 'AV:N/AC:H/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 3.1, 'vector': 'CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 2.3, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-05-18T17:53:07.926Z

Reserved: 2026-05-16T11:19:08.422Z

Link: CVE-2026-8741

cve-icon Vulnrichment

Updated: 2026-05-18T16:43:37.263Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-17T09:16:35.013

Modified: 2026-05-20T23:02:12.283

Link: CVE-2026-8741

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-17T11:00:12Z