---
title: "CVE-2026-95846: Moquette - Broken Access Control"
description: "Moquette < 0.18.1 contains a broken access control vulnerability caused by PostOffice.publishWill publishing Last-Will messages without authorization checks, letting attackers inject unauthorized messages on restricted topics, exploit requires client to configure a Will."
url: https://panop.io/threat-heartbeat/CVE-2026-95846/
---

# CVE-2026-95846 Moquette - Broken Access Control

Moquette < 0.18.1 contains a broken access control vulnerability caused by PostOffice.publishWill publishing Last-Will messages without authorization checks, letting attackers inject unauthorized messages on restricted topics, exploit requires client to configure a Will.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

Proof of concept available

Authentication

Not required

EPSS

0.27% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-95846)

## Details

Type

Broken Access Control

Impact

Broken Access Control, Data Tampering

CVSS vector

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

Published

23 September 2026

Updated

15 October 2026

Weakness

[CWE-862](https://cwe.mitre.org/data/definitions/862.html)

## Vendor fix

Update to version 0.18.1 or later.

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-2026-95846](https://nvd.nist.gov/vuln/detail/CVE-2026-95846)
- [https://github.com/moquette-io/moquette/commit/f5a323fe782d1505c0097498cb22eb6ec6c96973](https://github.com/moquette-io/moquette/commit/f5a323fe782d1505c0097498cb22eb6ec6c96973)
- [https://github.com/moquette-io/moquette/releases/tag/v0.18.1](https://github.com/moquette-io/moquette/releases/tag/v0.18.1)
- [https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq](https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq)

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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

Panop answers these inside your environment, for this CVE and every other finding.

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