CVE-2024-4769: Debian Linux

Medium severity, CVSS 5.9. EPSS: 0.4% chance of exploitation in the next 30 days.

When importing resources using Web Workers, error messages would distinguish the difference between `application/javascript` responses and non-script responses. This could have been abused to learn information cross-origin. This vulnerability affects Firefox < 126, Firefox ESR < 115.11, and Thunderbird < 115.11.

Affected products

• Debian Debian Linux: version 10.0 only
• Mozilla Firefox: before 115.11.0 (fixed in 115.11.0); before 126.0 (fixed in 126.0)
• Mozilla Thunderbird: before 115.11.0 (fixed in 115.11.0)

Published 2024-05-14. Last modified 2026-06-17.