Medium (6.5) in mozilla firefox. 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.
Severity
CVSS 3.1
6.5 medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS
0.5% chance of exploitation in the next 30 days; higher than 42% of CVEs (scores of 2026-10-31)