CVE-2023-43686: Medium severity Malwarebytes Malwarebytes vulnerability

Published Jun 9, 2026
·
Updated

An issue was discovered in Malwarebytes 4.x and 5.x (and Nebula 2020-10-21 and later). A large number of Firefox preference files can cause the parser to ignore other browser configuration files, leading to a denial of service.

Affected Software

2 affected components
Malwarebytes Malwarebytes>=4.0<5.0, >=5.0<6.0
Malwarebytes Nebula>=2020-10-21

Event History

Jun 9, 2026
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via NVD·07:16 PM
DescriptionSeverityWeakness
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Frequently Asked Questions

1

What is the severity of CVE-2023-43686?

CVE-2023-43686 has a medium severity rating of 6.2 on the CVSS scale.

2

What does CVE-2023-43686 affect?

CVE-2023-43686 affects Malwarebytes versions 4.x and 5.x, as well as Malwarebytes Nebula from October 21, 2020, and later.

3

What is the impact of CVE-2023-43686?

CVE-2023-43686 can lead to a denial of service due to the parser ignoring other browser configuration files.

4

How do I fix CVE-2023-43686?

To mitigate CVE-2023-43686, ensure you are using the latest version of Malwarebytes that addresses this vulnerability.

5

Is there a known exploit for CVE-2023-43686?

While there is no specific exploit publicly available for CVE-2023-43686, the vulnerability poses a risk of service disruption.

Contact

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