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CVE-2026-2760
AST
Critical

Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability was fixed in Firefox 148, Fire…

CVSS
10.0
Critical
EPSS
0.00
p31
Published
2026-01-01
Updated
2026-01-01
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.

Tags · CWE
Pre-auth
CWE-1384
Affected products
Firefox < 115.33.0Firefox < 148.0Firefox 128.0–140.8.0Thunderbird < 140.8.0Thunderbird < 148.0
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Timeline
2026-01-01
Published
2026-01-01
Updated
CVSS 3.1 breakdown
Attack Vector
AV: N
Network (N)
Attack Complexity
AC: L
Low (L)
Privileges Required
PR: N
None (N)
User Interaction
UI: N
None (N)
Scope
S: C
Changed (C)
Confidentiality Impact
C: H
High (H)
Integrity Impact
I: H
High (H)
Availability Impact
A: H
High (H)
Exploit indicators
EPSS
0.004 · p31
Known exploited (KEV)
No
Known exploits — Сканер-ВС
No Сканер-ВС checks registered for this vulnerability yet.
Affected products
Debian
FirefoxFirefox-esrThunderbird
Группа Астра (РусБИТех)
Firefox
Mozilla
FirefoxThunderbird
ProductVendorStatus
firefoxTracked
firefoxTracked
firefoxTracked
firefox-esrTracked
thunderbirdTracked
firefox*Tracked
thunderbird*Tracked
Source databases
AST
DEB
CVE