CyberICT

CVE-2026-74940

Mozilla · Published August 18, 2026

CVSS v3.1

CRITICAL
Patch availableGet patch

Description

Use-after-free in the Graphics: Text 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.

Affected Products

  • Firefox < 115.39.0
  • Firefox < 140.14.0
  • Firefox < 154.0.0
  • Thunderbird < 140.14.0

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H