CVE-2023-23597: Mozilla Firefox

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

A compromised web child process could disable web security opening restrictions, leading to a new child process being spawned within the `file://` context. Given a reliable exploit primitive, this new process could be exploited again leading to arbitrary file read. This vulnerability affects Firefox < 109.

Affected products

• Mozilla Firefox: before 109.0 (fixed in 109.0)

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