Description
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
References (5)
Scores
CVSS v3
9.8
EPSS
0.0009
EPSS Percentile
25.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
total
Details
CWE
CWE-119
CWE-686
CWE-843
Status
published
Products (8)
mozilla/firefox
< 140.6.0
mozilla/firefox
< 146.0
Mozilla/Firefox
140.6 - 140.*
Mozilla/Firefox
146
mozilla/thunderbird
< 140.6.0
mozilla/thunderbird
< 146.0
Mozilla/Thunderbird
140.6 - 140.*
Mozilla/Thunderbird
146
Published
Dec 09, 2025
Tracked Since
Feb 18, 2026