CVE-2026-95843

HIGHPre-NVD 8.78.7
EchelonGraph scoreLOW confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: secondary
Elevated
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 8.7Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.7
EG Score
8.7(low)
EG Risk
54(Attend)
EG Risk 54/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity87% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
—
EPSS %ILE
—
KEV
Not listed

Published

September 23, 2026

Last Modified

September 23, 2026

Advisory Details (4)

Auto-updated Sep 23, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

Release 0.18.1

Patch available: moquette-io/moquette v0.18.1

https://github.com/moquette-io/moquette/releases/tag/v0.18.1
github_commit Patch Available

commit affdc71fdba9 (moquette-io/moquette)

Patch available: moquette-io/moquette v0.18.1 (contains commit affdc71fdba9)

https://github.com/moquette-io/moquette/commit/affdc71fdba92dc020421678970ae70518fb6da2
github_pr Patch Available

Backport 958 0.18

Patch available: moquette-io/moquette v0.18.1 (PR #962 merged 2026-07-16)

https://github.com/moquette-io/moquette/pull/962
github Patch Available🟡 PoC Available

Pattern-ACL wildcard injection (cross-tenant authorization bypass) plus a remote-unauthenticated DoS cluster, a Will-message authorization bypass, and a cross-session durable-corruption bug · Advisory · moquette-io/moquette · GitHub

https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 5× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-23 18:17 UTCEG score recompute
  2. 2026-09-23 17:59 UTCEG score recompute
  3. 2026-09-23 17:18 UTCEG score recompute
  4. 2026-09-23 16:39 UTCEG score recompute
  5. 2026-09-23 16:39 UTCMITRE cvelistV5first tracked

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Frequently asked(4)

What is CVE-2026-95843?
CVE-2026-95843 is a high vulnerability published on September 23, 2026. 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…
When was CVE-2026-95843 disclosed?
CVE-2026-95843 was first published in the National Vulnerability Database on September 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-95843?
CVE-2026-95843 has a CVSS v3 base score of 8.7 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-95843?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-95843, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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