CVE-2022-42927: Mozilla Firefox

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

A same-origin policy violation could have allowed the theft of cross-origin URL entries, leaking the result of a redirect, via `performance.getEntries()`. This vulnerability affects Firefox < 106, Firefox ESR < 102.4, and Thunderbird < 102.4.

Affected products

• Mozilla Firefox: before 106.0 (fixed in 106.0)
• Mozilla Firefox ESR: before 102.4 (fixed in 102.4)
• Mozilla Thunderbird: before 102.4 (fixed in 102.4)

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