CVE-2024-5690: Debian Linux

Medium severity, CVSS 4.3. EPSS: 0.7% chance of exploitation in the next 30 days.

By monitoring the time certain operations take, an attacker could have guessed which external protocol handlers were functional on a user's system. This vulnerability affects Firefox < 127, Firefox ESR < 115.12, and Thunderbird < 115.12.

Affected products

• Debian Debian Linux: version 10.0 only
• Mozilla Firefox: before 127.0 (fixed in 127.0)
• Mozilla Firefox ESR: before 115.12 (fixed in 115.12)
• Mozilla Thunderbird: before 115.12 (fixed in 115.12)

Published 2024-06-11. Last modified 2026-06-17.