CVE-2022-34470: Mozilla Firefox

Critical severity, CVSS 9.8. EPSS: 1.1% chance of exploitation in the next 30 days.

Session history navigations may have led to a use-after-free and potentially exploitable crash. This vulnerability affects Firefox < 102, Firefox ESR < 91.11, Thunderbird < 102, and Thunderbird < 91.11.

Affected products

• Mozilla Firefox: before 102.0 (fixed in 102.0)
• Mozilla Firefox ESR: before 91.11 (fixed in 91.11)
• Mozilla Thunderbird: before 91.11 (fixed in 91.11)

Published 2022-12-22. Last modified 2026-06-17.