Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-95843

CVE-2026-95843HIGH

moquette-io moquette — Moquette malformed shared subscriptions can crash command processing

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   N   N   N   H    8.7   .0043   34.9     —

AFFECTED
  Product   Versions    Fixed
  moquette  < 0.18.1 –  —

TIMELINE
  Sep 22  Reserved by GitHub_M
  Sep 23  Published (CNA: GitHub_M)
  Sep 25  EXPLOIT PUBLISHED — CVE-2026-95843 (moquette-io moquette). Public exploit reference added.

CWE-20 · CNA: GitHub_M · CVSS v4.0 · 4 references · NVD status: Analyzed

Description

Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.subscribe parses a shared-subscription filter through SharedSubscriptionUtils.extractShareName before validating the complete $share/{shareName}/{topicFilter} structure. A remote client can send a filter such as $share/grp without a topic-filter portion, causing a StringIndexOutOfBoundsException while calculating the share name. The exception terminates command handling on the shared session event loop and can deny service to other client sessions assigned to that loop. This issue is fixed in version 0.18.1.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 22, 2026	Reserved	Reserved by GitHub_M
September 23, 2026	Published	Published (CNA: GitHub_M)
September 25, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-95843 (moquette-io moquette). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
moquette-io	moquette	—	< 0.18.1	—

Weaknesses

CWE-20

References (4)

https://github.com/moquette-io/moquette/commit/affdc71fdba92dc020421678970ae70518fb6da2 [Patch]
https://github.com/moquette-io/moquette/pull/962 [Patch]
https://github.com/moquette-io/moquette/releases/tag/v0.18.1 [Release Notes]
https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq [Exploit, Mitigation, Vendor Advisory]

Authoritative record: CVE-2026-95843 at cve.org

Vendors: moquette-io

Weaknesses: CWE-20

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-95843 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.