CVE-2023-0767: Mozilla Firefox

High severity, CVSS 8.8. EPSS: 0.8% chance of exploitation in the next 30 days.

An attacker could construct a PKCS 12 cert bundle in such a way that could allow for arbitrary memory writes via PKCS 12 Safe Bag attributes being mishandled. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and Firefox ESR < 102.8.

Affected products

• Mozilla Firefox: before 110.0 (fixed in 110.0)
• Mozilla Firefox ESR: before 102.8 (fixed in 102.8)
• Mozilla Thunderbird: before 102.8 (fixed in 102.8)

Published 2023-06-02. Last modified 2026-06-17.