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CVE-2026-8741

EMQX QoS 2 PUBLISH Packet emqx_persistent_session_ds.erl race condition

Published: May 17, 2026Updated: May 20, 2026 Sources: CVE List NVDCWE-362
NVD MITRE
3.1CVSSLOW
EPSS Score
0.3%
Top 80.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only

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.

CVSS Vector Breakdown

AV:NAC:HPR:LUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-362

Affected Products

EMQXn/a
emqxemqx
Mixed
Cloud & SaaS / api-gateway
emqxcommercialCNCloud & SaaS

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Workaround Available

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://vuldb.com/vuln/364329
vuldb.com
https://vuldb.com/vuln/364329/cti
vuldb.com
https://vuldb.com/submit/809931
vuldb.com
and 2 more references View all →

Timeline

Published
May 17, 2026
Last Updated
May 20, 2026

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