Is CVE-2023-28366 actively exploited?

CVE-2023-28366 has no public evidence of in-the-wild exploitation as of 2025-06-26.

What is the CVSS score for CVE-2023-28366?

CVE-2023-28366 has a CVSS score of 7.5 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2023-28366?

Patch guidance is available from eclipse security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2023-28366.

Fix CVE-2023-28366 - HIGH eclipse mosquitto

Description

The broker in Eclipse Mosquitto 1.3.2 through 2.x before 2.0.16 has a memory leak that can be abused remotely when a client sends many QoS 2 messages with duplicate message IDs, and fails to respond to PUBREC commands. This occurs because of mishandling of EAGAIN from the libc send function.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-401 CWE-401

Metadata

Primary Vendor: ECLIPSE
Published: 9/1/2023
Last Modified: 6/26/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2023-28366

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary