CVE-2026-8741

EMQX QoS 2 PUBLISH Packet emqx_persistent_session_ds.erl race condition

LOW
3.1
CVSS Score
Published: May 17, 2026 at 08:15 AM UTC
Updated: June 17, 2026 at 11:04 AM UTC
1 product affected across 1 vendorEmqx

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Severity
LOW3.1
Exploit prediction
EPSS 0.3%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

5.0.0 ≤ v ≤ 6.2.06.06.16.2.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (5)

VDB EntryThird Party Advisory
Source: cverecord
https://vuldb.com/vuln/364329
SignaturePermissions RequiredVDB Entry
Source: cverecord
https://vuldb.com/vuln/364329/cti
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/submit/809931
RelatedThird Party Advisory
Source: cverecord
https://github.com/Pathfind-tama/Report_EMQX_MQTT

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

3.1LOWVulDB
Vector?

Quick Info

StatusANALYZED
CWE
CWE-362

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