CVE-2023-34488

Name: CVE-2023-34488
Creator: NVD / NIST
Published: 2023-06-12T14:15:19.623+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.51%

Last modified Jun 17, 2026

CVE-2023-34488 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. NanoMQ 0.17.5 has a one-byte heap-based buffer over-read in the conn_handler function of mqtt_parser.c when it processes malformed messages.. EPSS estimates a 0.51% chance of exploitation in the next 30 days.

Description

NanoMQ 0.17.5 has a one-byte heap-based buffer over-read in the conn_handler function of mqtt_parser.c when it processes malformed messages.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.51%

39.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Emqx	Nanomq	0.17.5

References

https://github.com/emqx/nanomq/issues/1181Exploit, Issue Tracking, Patch, Vendor Advisory
https://github.com/emqx/nanomq/issues/1181Exploit, Issue Tracking, Patch, Vendor Advisory

Timeline

Published: Jun 12, 2023
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-34488?

NanoMQ 0.17.5 has a one-byte heap-based buffer over-read in the conn_handler function of mqtt_parser.c when it processes malformed messages.

How severe is CVE-2023-34488?

CVE-2023-34488 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.51% probability of exploitation in the next 30 days.

How do I fix CVE-2023-34488?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-34488?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST