---
title: "CVE-2026-102717: MQTT WebSocket - Information Disclosure & Denial of Service"
description: "MQTT WebSocket contains a memory disclosure or crash vulnerability caused by setter ABI mismatch, letting attackers cause denial of service or information disclosure, exploit requires crafted WebSocket messages."
url: https://panop.io/threat-heartbeat/CVE-2026-102717/
---

# CVE-2026-102717 MQTT WebSocket - Information Disclosure & Denial of Service

MQTT WebSocket contains a memory disclosure or crash vulnerability caused by setter ABI mismatch, letting attackers cause denial of service or information disclosure, exploit requires crafted WebSocket messages.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.26% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-102717)

## Details

Type

Information Disclosure

Impact

Denial Of Service, Information Disclosure

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Published

30 September 2026

Updated

15 October 2026

Weakness

[CWE-125](https://cwe.mitre.org/data/definitions/125.html)

## Vendor fix

Update to the latest version with the ABI mismatch fixed.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-102717](https://nvd.nist.gov/vuln/detail/CVE-2026-102717)
- [https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-hp64-f44f-wjw6](https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-hp64-f44f-wjw6)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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