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CVE-2023-3592

24
FAUCET Score

CVE-2023-3592 is a memory leak vulnerability affecting Eclipse Mosquitto versions prior to 2.0.16. This flaw occurs when clients send MQTT v5 CONNECT packets containing a will message with invalid property types. Rated 7.5 HIGH, this vulnerability can be exploited remotely with low attack complexity, leading to a denial of service (availability impact) without requiring user interaction or privileges. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.0.16CPE matchmatch criteria
cpe:2.3:a:eclipse:mosquitto:*:*:*:*:*:*:*:*
>= 0, < 2.0.16CPE match
cpe:2.3:a:eclipse:mosquitto:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.8MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.68%
Probability of exploitation in next 30 days
EPSS Percentile
48.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0067 is in the 25th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Satellite 6.13 for RHEL 8Fixed in: mosquitto-0:2.0.17-1.el8sat
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Satellite 6.14 for RHEL 8Fixed in: mosquitto-0:2.0.17-1.el8sat
View patch

Vendor Advisories (1)

redhatCVE-2023-3592Moderate

mosquitto: memory leak leads to unresponsive broker

Sep 1, 2023

References

mosquitto.org / blog/2023/08/version-2-0-16-released
Release Notes
security.gentoo.org / glsa/202401-09