CVE-2023-34494

Name: CVE-2023-34494
Creator: NVD / NIST
Published: 2023-06-12T14:15:19.69+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.67%

Last modified Jun 17, 2026

CVE-2023-34494 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. NanoMQ 0.16.5 is vulnerable to heap-use-after-free in the nano_ctx_send function of nmq_mqtt.c.. EPSS estimates a 0.67% chance of exploitation in the next 30 days.

Description

NanoMQ 0.16.5 is vulnerable to heap-use-after-free in the nano_ctx_send function of nmq_mqtt.c.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.67%

47.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Emqx	Nanomq	0.16.5

References

https://github.com/emqx/nanomq/issues/1180Issue Tracking, Patch, Vendor Advisory
https://github.com/emqx/nanomq/issues/1180Issue Tracking, Patch, Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2023-34494?

NanoMQ 0.16.5 is vulnerable to heap-use-after-free in the nano_ctx_send function of nmq_mqtt.c.

How severe is CVE-2023-34494?

CVE-2023-34494 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.67% probability of exploitation in the next 30 days.

How do I fix CVE-2023-34494?

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-2023-34494?

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

Scan your code now

Source: NVD / NIST