CVE-2023-43686 Denial of service in n/a
A large number of Firefox preference files can cause the parser to ignore other browser configuration files, leading to a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-43686?
CVE-2023-43686 is a medium-severity denial of service vulnerability in n/a, published on 9 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-755
Which versions are affected by CVE-2023-43686?
How do I fix CVE-2023-43686?
No fix has been published for CVE-2023-43686 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-43686 being exploited?
There is no known exploitation of CVE-2023-43686 in the wild and no public exploit code.
Sources
Also known as GHSA-485v-wc7x-92fx.