CVE-2026-95843Network attack vectorHinoki check available

Denial of service via malformed shared subscription

Published Sep 23, 2026 · Updated Sep 23, 2026

Denial of service in Moquette before 0.18.1 allows remote attackers to disrupt broker sessions via malformed shared subscriptions. PostOffice.subscribe calls SharedSubscriptionUtils.extractShareName before validating that the complete shared-subscription structure includes a topic-filter portion, so $share/grp raises StringIndexOutOfBoundsException. Any MQTT client able to submit a SUBSCRIBE packet can terminate its shared session event loop and deny service to other sessions assigned to that loop.

CVSS severityUnavailable
Unscored
EPSS probability0.43%
Next 30 days · Oct 18, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Denial of service in Moquette before 0.18.1 allows remote attackers to disrupt broker sessions via malformed shared subscriptions. PostOffice.subscribe calls SharedSubscriptionUtils.extractShareName before validating that the complete shared-subscription structure includes a topic-filter portion, so $share/grp raises StringIndexOutOfBoundsException. Any MQTT client able to submit a SUBSCRIBE packet can terminate its shared session event loop and deny service to other sessions assigned to that loop.

The record

CVE
CVE-2026-95843
Published
Sep 23, 2026
Updated
Sep 23, 2026
Vendor
Moquette
Product
Moquette
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.18.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Moquette · Moquetteversion=< 0.18.1

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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