CVE-2026-16366

HIGH

Privilege escalation in the DOM: Navigation component

Title source: cna
STIX 2.1

Description

Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

References (3)

Core 3

Scores

CVSS v3 8.8
EPSS 0.0027
EPSS Percentile 18.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-269
Status published
Products (4)
mozilla/firefox < 153.0.0
Mozilla/Firefox 153
mozilla/thunderbird < 153.0
Mozilla/Thunderbird 153
Published Jul 21, 2026
Tracked Since Jul 21, 2026