CVE-2025-10859

medium

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.

References

https://www.mozilla.org/security/advisories/mfsa2025-79/

https://bugzilla.mozilla.org/show_bug.cgi?id=1684624

Details

Source: Mitre, NVD

Published: 2025-09-30

Updated: 2026-04-13

Risk Information

CVSS v2

Base Score: 2.1

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N

Severity: Low

CVSS v3

Base Score: 4

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Severity: Medium

EPSS

EPSS: 0.00012