Read the docs
TI-2026-63710 Aliases CVE-2026-95845

Moquette unbounded per-session message queues allow memory exhaustion

Priority MEDIUM 44CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-770.

Summary

Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, the broker does not enforce a maximum length for pending per-session message queues. When a fast publisher sends messages to a slow subscriber whose in-flight window is full, queued messages can accumulate without bound in memory or persistent storage. Remote clients can use this condition to exhaust broker resources and cause a denial of service. This issue is fixed in version 0.18.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00415 36th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed moquette (moquette-io): 0.18.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
moquette-iomoquettebefore 0.18.10.18.1Patch availableCNA
  • moquette Vendormoquette-io Affected before 0.18.1 Fixed in 0.18.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:moquette:moquette:*:*:*:*:*:*:*:*before 0.18.1Vulnerablemoquette-io
  • cpe:2.3:a:moquette:moquette:*:*:*:*:*:*:*:* Versions before 0.18.1 Vulnerable ·moquette-io

Remediation

  • Fix · CNA moquette (moquette-io) Fixed in 0.18.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-95845

References

Exploit 1

Patch 1

Other 1

  • TI-2026-63713 Moquette fails open when configured authentication or authorization classes cannot load CVSS 4.0CRITICAL 9.3
  • TI-2026-63712 Moquette client IDs can cause cross-session H2 durable-queue corruption CVSS 4.0HIGH 8.8
  • TI-2026-63711 Moquette publishes Last-Will messages without enforcing write authorization CVSS 4.0HIGH 8.7
  • TI-2026-63709 Moquette deeply nested MQTT topics can cause stack exhaustion CVSS 4.0HIGH 8.7
  • TI-2026-63708 Moquette malformed shared subscriptions can crash command processing CVSS 4.0HIGH 8.7
  • TI-2026-63707 Moquette uncaught MQTT command exceptions can terminate shared session event loops CVSS 4.0HIGH 8.7
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences