CVE-2022-45410: Mozilla Firefox

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

When a ServiceWorker intercepted a request with <code>FetchEvent</code>, the origin of the request was lost after the ServiceWorker took ownership of it. This had the effect of negating SameSite cookie protections. This was addressed in the spec and then in browsers. This vulnerability affects Firefox ESR < 102.5, Thunderbird < 102.5, and Firefox < 107.

Affected products

• Mozilla Firefox: before 107.0 (fixed in 107.0)
• Mozilla Firefox ESR: before 102.5 (fixed in 102.5)
• Mozilla Thunderbird: before 102.5 (fixed in 102.5)

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