CVE-2024-9392: Mozilla Firefox

Critical severity, CVSS 9.8. EPSS: 0.5% chance of exploitation in the next 30 days.

A compromised content process could have allowed for the arbitrary loading of cross-origin pages. This vulnerability affects Firefox < 131, Firefox ESR < 128.3, Firefox ESR < 115.16, Thunderbird < 128.3, and Thunderbird < 131.

Affected products

• Mozilla Firefox: before 115.6.0 (fixed in 115.6.0); before 131.0 (fixed in 131.0)
• Mozilla Thunderbird: before 128.3.0 (fixed in 128.3.0); from 129.0, before 131.0 (fixed in 131.0)

Published 2024-10-01. Last modified 2026-06-17.