CVE-2025-3032: Mozilla Firefox

High severity, CVSS 7.4. EPSS: 0.4% chance of exploitation in the next 30 days.

Leaking of file descriptors from the fork server to web content processes could allow for privilege escalation attacks. This vulnerability was fixed in Firefox 137 and Thunderbird 137.

Affected products

• Mozilla Firefox: before 137.0 (fixed in 137.0)
• Mozilla Thunderbird: before 137.0 (fixed in 137.0)

Published 2025-04-01. Last modified 2026-09-30.