CVE-2026-95844
Moquette deeply nested MQTT topics can cause stack exhaustion
Description
Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, Moquette does not limit the depth of topic names and topic filters before processing them through recursive CTrie insertion and matching operations. A remote client can publish or subscribe with a deeply nested topic, causing a StackOverflowError that disrupts session processing and can deny service to broker clients. This issue is fixed in version 0.18.1.
INFO
Published Date :
Sept. 23, 2026, 5:17 p.m.
Last Modified :
Sept. 29, 2026, 2:16 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Moquette to version 0.18.1 or later.
- Limit topic name and filter depth.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-95844.
| URL | Resource |
|---|---|
| https://github.com/moquette-io/moquette/commit/ca17e0be19e86d5e291f4532dfdc94616c8e0049 | Patch |
| https://github.com/moquette-io/moquette/releases/tag/v0.18.1 | Release Notes |
| https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq | Exploit Mitigation Vendor Advisory |
| https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq | Exploit Mitigation Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-95844 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-95844
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-95844 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-95844 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Sep. 29, 2026
Action Type Old Value New Value Added Reference https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq Added SSVC {'id': 'CVE-2026-95844', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-09-29T02:02:23.767947Z'} -
Initial Analysis by [email protected]
Sep. 28, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:moquette:moquette:*:*:*:*:*:*:*:* versions up to (excluding) 0.18.1 Added Reference Type GitHub, Inc.: https://github.com/moquette-io/moquette/commit/ca17e0be19e86d5e291f4532dfdc94616c8e0049 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/moquette-io/moquette/releases/tag/v0.18.1 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq Types: Exploit, Mitigation, Vendor Advisory -
New CVE Received by [email protected]
Sep. 23, 2026
Action Type Old Value New Value Added Description Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, Moquette does not limit the depth of topic names and topic filters before processing them through recursive CTrie insertion and matching operations. A remote client can publish or subscribe with a deeply nested topic, causing a StackOverflowError that disrupts session processing and can deny service to broker clients. This issue is fixed in version 0.18.1. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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 Added CWE CWE-674 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/95xxx/CVE-2026-95844.json">CVE-2026-95844</a> Added Reference https://github.com/moquette-io/moquette/commit/ca17e0be19e86d5e291f4532dfdc94616c8e0049 Added Reference https://github.com/moquette-io/moquette/releases/tag/v0.18.1 Added Reference https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq