CVE-2023-23600: Mozilla Firefox

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Per origin notification permissions were being stored in a way that didn't take into account what browsing context the permission was granted in. This lead to the possibility of notifications to be displayed during different browsing sessions. *This bug only affects Firefox for Android. Other operating systems are unaffected.* This vulnerability affects Firefox < 109.

Affected products

• Mozilla Firefox: before 109.0 (fixed in 109.0)

Published 2023-06-02. Last modified 2026-06-17.