Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.publishWill publishes a client-controlled Last Will message through publish2Subscribers without invoking the authorizator.canWrite check used by normal PUBLISH paths. When anonymous access is enabled and topic ACLs restrict writes, a remote client can set an ACL-protected topic as the Last Will Topic during CONNECT and perform an abnormal client disconnect, causing the broker to inject attacker-controlled messages into a topic for which the client lacks write permission. This issue is fixed in version 0.18.1.
CVE-2026-85058
HIGHPre-NVD 7.57.5—Trending — 3 sources updated this weekElevated
EchelonGraph scoreMEDIUM confidence
This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 64% of all CVEs by exploit prediction. 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: epss, secondary
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.5
- EG Score
- 7.5(medium)
- EG Risk
- 65(Attend)EG Risk 65/100SSVC: 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 computedSeverity75% × 45%Exploitation40% × 40%Automatability100% × 15%Action: Remediate soon — notable exploitation risk. - EPSS PROB
- 0%
- EPSS %ILE
- 36%
- KEV
- Not listed
Published
September 18, 2026
Last Modified
September 24, 2026
Advisory Details (4)
Auto-updated Sep 18, 2026🔬 Proof of concept available. Patch available. Sources: github_commit, github_release, github.
github Patch Available🟡 PoC Available
Missing Authorization in io.moquette:moquette-broker · Advisory · moquette-io/moquette · GitHub
https://github.com/moquette-io/moquette/security/advisories/GHSA-9jjc-fw8x-fmwxgithub_release Patch Available
Release 0.18.1
Patch available: moquette-io/moquette v0.18.1
https://github.com/moquette-io/moquette/releases/tag/v0.18.1github_commit Patch Available
commit f5a323fe782d (moquette-io/moquette)
Patch available: moquette-io/moquette v0.18.1 (contains commit f5a323fe782d)
https://github.com/moquette-io/moquette/commit/f5a323fe782d1505c0097498cb22eb6ec6c96973github_commit
commit e23df019f6a1 (moquette-io/moquette)
Fix landed in moquette-io/moquette commit e23df019f6a1 — awaiting tagged release
https://github.com/moquette-io/moquette/commit/e23df019f6a11e22c7d2047d4f86d07095466c97Vendor Advisories for CVE-2026-85058(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(1 across 1 ecosystem)
Maven(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| io.moquette:moquette-broker | 0.15, 0.16, 0.17 | 0.18.1 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 15× in last 7d / 15× 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.
- 2026-09-24 21:38 UTCEG score recompute
- 2026-09-24 14:04 UTCEPSS rescore
- 2026-09-24 01:01 UTCEG score recompute
- 2026-09-23 17:54 UTCEPSS rescore
- 2026-09-22 16:23 UTCEG score recompute
- 2026-09-22 16:01 UTCEPSS rescore
- 2026-09-22 15:20 UTCEG score recompute
- 2026-09-21 22:39 UTCEG score recompute
- 2026-09-21 21:09 UTCEPSS rescore
- 2026-09-21 00:53 UTCEG score recompute
- 2026-09-20 20:16 UTCEPSS rescore
- 2026-09-19 16:12 UTCEG score recompute
- 2026-09-18 18:27 UTCEG score recompute
- 2026-09-18 17:49 UTCEG score recompute
- 2026-09-18 17:49 UTCMITRE cvelistV5first tracked
Related CVEs(same product + same CWE)
Same product
8 shownMaven:io.moquette:moquette-broker
Frequently asked(5)
What is CVE-2026-85058?
CVE-2026-85058 is a high vulnerability published on September 18, 2026. Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.publishWill publishes a client-controlled Last Will message through publish2Subscribers without invoking the authorizator.canWrite check used by normal PUBLISH paths. When anonymous access is enabled and topic ACLs restrict…
When was CVE-2026-85058 disclosed?
CVE-2026-85058 was first published in the National Vulnerability Database on September 18, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-85058 actively exploited?
CVE-2026-85058 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 63.5% of all scored CVEs.
What is the CVSS score of CVE-2026-85058?
CVE-2026-85058 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-85058?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-85058, 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.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-85058
Is Your Infrastructure Affected by CVE-2026-85058?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.