CVE-2026-0878 - Vulnerability Details - OpenCVE

Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

No data.

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References

Link	Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=2003989
https://www.mozilla.org/security/advisories/mfsa2026-01/
https://www.mozilla.org/security/advisories/mfsa2026-03/

History

Tue, 13 Jan 2026 16:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-119 CWE-20
Metrics		cvssV3_1 `{'score': 8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Tue, 13 Jan 2026 14:00:00 +0000

Type	Values Removed	Values Added
Description		Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7.
Title		Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component
References		https://bugzilla.mozilla.org/show_bug.cgi?id=2003989 https://www.mozilla.org/security/advisories/mfsa2026-01/ https://www.mozilla.org/security/advisories/mfsa2026-03/

MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2026-01-13T13:30:53.697Z

Updated: 2026-01-13T15:43:10.236Z

Reserved: 2026-01-13T13:30:53.395Z

Link: CVE-2026-0878

Vulnrichment

Updated: 2026-01-13T15:42:06.904Z

NVD

Status : Received

Published: 2026-01-13T14:16:38.367

Modified: 2026-01-13T16:16:11.487

Link: CVE-2026-0878

Redhat

No data.

OpenCVE Enrichment

No data.

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