CVE-2022-22760: Mozilla Firefox

Medium severity, CVSS 6.5. EPSS: 0.8% chance of exploitation in the next 30 days.

When importing resources using Web Workers, error messages would distinguish the difference between <code>application/javascript</code> responses and non-script responses. This could have been abused to learn information cross-origin. This vulnerability affects Firefox < 97, Thunderbird < 91.6, and Firefox ESR < 91.6.

Affected products

• Mozilla Firefox: before 97.0 (fixed in 97.0)
• Mozilla Firefox ESR: before 91.6 (fixed in 91.6)
• Mozilla Thunderbird: before 91.6 (fixed in 91.6)

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