CVE-2026-6749

HIGH

Information disclosure due to uninitialized memory in the Graphics: Canvas2D component

Title source: cna
STIX 2.1

Description

Information disclosure due to uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

References (6)

Core 6

Scores

CVSS v3 7.5
EPSS 0.0034
EPSS Percentile 25.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-908
Status published
Products (8)
mozilla/firefox < 115.35.0
mozilla/firefox < 150.0
Mozilla/Firefox 115.35 - 115.*
Mozilla/Firefox 140.10 - 140.*
Mozilla/Firefox 150
mozilla/thunderbird < 140.10.0
Mozilla/Thunderbird 140.10 - 140.*
Mozilla/Thunderbird 150
Published Apr 21, 2026
Tracked Since Apr 21, 2026