CVE-2024-6606: Mozilla Firefox

High severity, CVSS 8.2. EPSS: 0.4% chance of exploitation in the next 30 days.

Clipboard code failed to check the index on an array access. This could have led to an out-of-bounds read. This vulnerability affects Firefox < 128 and Thunderbird < 128.

Affected products

• Mozilla Firefox: before 128.0 (fixed in 128.0)
• Mozilla Thunderbird: before 128.0 (fixed in 128.0)

Published 2024-07-09. Last modified 2026-06-17.