CVE-2026-2760

CRITICAL

Firefox <115.33.0, 115.33-115.*, <148.0, >=148; Thunderbird <140.8.0, >=140.8 <140.*, >=148 Sandbox Escape via WebRender

Title source: llm
STIX 2.1

Description

Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

References (6)

Core 6

Scores

CVSS v3 10.0
EPSS 0.0008
EPSS Percentile 23.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-1384
Status published
Products (9)
mozilla/firefox < 115.33.0
mozilla/firefox < 148.0
Mozilla/Firefox 115.33 - 115.*
Mozilla/Firefox 140.8 - 140.*
Mozilla/Firefox 148
mozilla/thunderbird < 140.8.0
mozilla/thunderbird < 148.0
Mozilla/Thunderbird 140.8 - 140.*
Mozilla/Thunderbird 148
Published Feb 24, 2026
Tracked Since Feb 24, 2026