CVE-2024-0753: Debian Linux

Medium severity, CVSS 6.5. EPSS: 0.7% chance of exploitation in the next 30 days.

In specific HSTS configurations an attacker could have bypassed HSTS on a subdomain. This vulnerability affects Firefox < 122, Firefox ESR < 115.7, and Thunderbird < 115.7.

Affected products

• Debian Debian Linux: version 10.0 only
• Mozilla Firefox: before 122.0 (fixed in 122.0)
• Mozilla Firefox ESR: before 115.7 (fixed in 115.7)
• Mozilla Thunderbird: before 115.7 (fixed in 115.7)

Published 2024-01-23. Last modified 2026-06-17.