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CVE

CVE-2026-95843

Moquette malformed shared subscriptions can crash command processing
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CVE

CVE-2026-95843

Moquette malformed shared subscriptions can crash command processing

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.3
-
4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
9.6
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Related Resources

No items found.

References

https://github.com/moquette-io/moquette/releases/tag/v0.18.1, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/95xxx/CVE-2026-95843.json, https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq, https://nvd.nist.gov/vuln/detail/CVE-2026-95843, https://github.com/moquette-io/moquette/commit/affdc71fdba92dc020421678970ae70518fb6da2, https://github.com/moquette-io/moquette/pull/962

Severity

9.6

CVSS Score
0
10

Basic Information

Base CVSS
9.6
EPSS Probability
0.00424%
EPSS Percentile
0.35281%
Introduced Version
0,0.15
Fix Available
affdc71fdba92dc020421678970ae70518fb6da2

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