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CVE WatchSep 15, 2026

CVE-2026-92020

Privilege escalation due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability was fixed in Firefox 156,

CVSS

8.8

High

EPSS

—

KEV

—

Exploit Today

—

0-100

Published: Sep 15, 2026 · Last modified: Sep 15, 2026 · CWE-120

EPSS · 30d

Not enough EPSS history yet.

Technical description

Privilege escalation due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, and Firefox ESR 153.3.

Official references
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CVE-2026-920438.8 HIG
—
———Privilege escalation due to incorrect boundary conditions in the Audio/Video component. This vulnerability was fixed in Firefox 156 and Firefox ESR 153.3.6hCVE-2026-920148.8 HIG
—
———Privilege escalation due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox ESR 115.41 and Firefox ESR 140.16.6hCVE-2026-920138.8 HIG
—
———Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, and Firefox ESR 153.3.6hCVE-2026-920128.8 HIG
—
———Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, and Firefox ESR 153.3.6hCVE-2026-920118.8 HIG
—
———Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, and Firefox ESR 153.3.6hCVE-2026-920108.8 HIG
—
———Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, and Firefox ESR 153.3.6h