Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-0878

Severity CVSS v4.0:
Pending analysis
Type:
CWE-20 Input Validation
Publication date:
13/01/2026
Last modified:
22/01/2026

Description

Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability affects Firefox

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N CVSS v3.1 Severity and Metrics:

Base Score: 8.00 HIGH
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Changed
Confidentiality (C): High
Integrity (I): High
Availability (A): None

Base Score 3.x
8.00
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* 140.7.0 (excluding)
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* 147.0 (excluding)
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:* 140.7.0 (excluding)
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:* 147.0 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools