What is CVE-2023-43686?

CVE-2023-43686 is a medium-severity vulnerability, classified under Improper Handling of Exceptional Conditions. CVSS score: 6.2/10. Published 2026-06-09.

How severe is CVE-2023-43686?

Medium severity. CVSS v3 base score is 6.2 out of 10.

CVE-2023-43686

CVE-2023-43686

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.

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Weakness classification (CWE)

CWE-755 — Improper Handling of Exceptional Conditions

References

cve@mitre.org

Frequently asked questions

What is CVE-2023-43686?: CVE-2023-43686 is a medium-severity vulnerability, classified under Improper Handling of Exceptional Conditions. CVSS score: 6.2/10. Published 2026-06-09.
How severe is CVE-2023-43686?: Medium severity. CVSS v3 base score is 6.2 out of 10.