Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Moquette | Moquette | < 0.18.1 |
Related Weaknesses (CWE)
References
- https://github.com/moquette-io/moquette/commit/affdc71fdba92dc020421678970ae7051Patch
- https://github.com/moquette-io/moquette/pull/962Patch
- https://github.com/moquette-io/moquette/releases/tag/v0.18.1Release Notes
- https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhqExploitMitigationVendor Advisory
- https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhqExploitMitigationVendor Advisory
FAQ
What is CVE-2026-95843?
CVE-2026-95843 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 $s...
How severe is CVE-2026-95843?
CVE-2026-95843 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-95843?
Check the references section above for vendor advisories and patch information. Affected products include: Moquette Moquette.