Description
Sandbox escape due to integer overflow in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 143.0.3.
Scores
CVSS v3
8.6
EPSS
0.0006
EPSS Percentile
18.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-190
Status
published
Products (2)
mozilla/firefox
< 143.0.3
Mozilla/Firefox
143.0.3
Published
Sep 30, 2025
Tracked Since
Feb 18, 2026