Description
Cookie storage for non-HTML temporary documents was being shared incorrectly with normal browsing content, allowing information from private tabs to escape Incognito mode even after the user closed all tabs. This vulnerability was fixed in Firefox for iOS 143.1.
Scores
CVSS v3
4.0
EPSS
0.0002
EPSS Percentile
4.3%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-359
Status
published
Products (2)
mozilla/firefox
< 143.1.0
Mozilla/Firefox for iOS
143.1
Published
Sep 30, 2025
Tracked Since
Feb 18, 2026