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 (36)

Core 36
Core References

Scores

CVSS v3 7.5
EPSS 0.0040
EPSS Percentile 33.1%
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-824 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