Description
Sandbox escape due to undefined behavior, invalid pointer in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3.
References (7)
Scores
CVSS v3
7.3
EPSS
0.0009
EPSS Percentile
25.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-693
Status
published
Products (7)
mozilla/firefox
< 140.3.0
mozilla/firefox
< 143.0
Mozilla/Firefox
140.3 - 140.*
Mozilla/Firefox
143
mozilla/thunderbird
< 140.3.0
Mozilla/Thunderbird
140.3 - 140.*
Mozilla/Thunderbird
143
Published
Sep 16, 2025
Tracked Since
Feb 18, 2026