CVE-2023-6868: Mozilla Firefox

Medium severity, CVSS 4.3. EPSS: 0.5% chance of exploitation in the next 30 days.

In some instances, the user-agent would allow push requests which lacked a valid VAPID even though the push manager subscription defined one. This could allow empty messages to be sent from unauthorized parties. *This bug only affects Firefox on Android.* This vulnerability affects Firefox < 121.

Affected products

• Mozilla Firefox: before 121.0 (fixed in 121.0)

Published 2023-12-19. Last modified 2026-06-17.