CVE-2026-8741 LOW

CVE-2026-8741: EMQX QoS 2 PUBLISH Packet emqx_persistent_session_ds.erl race condition

Vendor N/A
Product EMQX
Weakness CWE-362
Published May 17, 2026
Last update May 18, 2026

CVSS base score

2.3/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 17, 2026 CVE published
May 18, 2026 Record updated