TI-2021-12727 Aliases CVE-2021-33176 GHSA-h44q-8m75-8x46

Deserialization of untrusted data in vernemq

LOW 35CWE-502Published 2021-06-08 · Updated 2024-08-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution, Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-502 and CWE-770.

Summary

VerneMQ MQTT Broker versions prior to 1.12.0 are vulnerable to a denial of service attack as a result of excessive memory consumption due to the handling of untrusted inputs. These inputs cause the message broker to consume large amounts of memory, resulting in the application being terminated by the operating system.

Why it matters now

EPSS 0.011 65th percentileScored 2026-11-07

Fix Fixed vernemq (VerneMQ): 1.12.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
VerneMQ	vernemq	before 1.12.0	1.12.0	Patch available	CNA

vernemq VendorVerneMQ Affected before 1.12.0 Fixed in 1.12.0 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:octavolabs:vernemq::::::::	before 1.12.0	Vulnerable	Octavolabs

cpe:2.3:a:octavolabs:vernemq:*:*:*:*:*:*:*:* Versions before 1.12.0 Vulnerable ·Octavolabs

Remediation

Fix · CNA vernemq (VerneMQ) Fixed in 1.12.0

Timeline

2026-10-02 Threatist record created from CVE-2021-33176
2026-10-03 Alias added: GHSA-h44q-8m75-8x46

References

Advisory 1

https://www.synopsys.com/blogs/software-security/cyrc-advisory-rabbitmq-emqx-vernemq

TI-2024-29898 A memory allocation issue in vernemq v2.0.1 allows attackers to cause a Denial of Service… CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences