CVE-2026-74934

—

CVSS 3.1

7.5 high

EPSS

<1%p5

Published

Aug 18, 2026 (28d ago)

Modified

Aug 24, 2026

Description

Site isolation issue in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

Vendors: mozilla
Products: firefox, thunderbird
Weakness: CWE-200, CWE-284, CWE-346
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.2%)

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