CVE-2026-95843: moquette · Improper Input Validation
Affects moquetteSource CVE Database V5
Not known to be exploited · CVSS 8.7 High : upgrade to 0.18.1 soon.
Data as of 6 Nov 2026, 23:24 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 37% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 0.18.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 23 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.
What to do
Upgrade moquette and moquette-io/moquette to 0.18.1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| moquette-iomoquette | Affected
| Fixed in
|
GitHubmoquette-io/moquettepkg:github/moquette-io/moquetteOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade moquette to version 0.18.1 or later, where this input validation issue is fixed. No other mitigations are indicated.
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.
References
- github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq (opens in a new tab)
- github.com/moquette-io/moquette/pull/962 (opens in a new tab)
- github.com/moquette-io/moquette/commit/affdc71fdba92dc020421678970ae70518fb6da2 (opens in a new tab)
- github.com/moquette-io/moquette/releases/tag/v0.18.1 (opens in a new tab)