CVE-2026-8959

CVE-2026-8959 — VulnCheck: Sandbox escape due to incorrect boundary conditions in the Widget: Win

📅 2026-05-19

🔴 Critical 🔥 No VulnCheck Exploit Windows CVSS 9.6

📋 الوصف الكامل

Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

💻 الأنظمة المتأثرة

Mozilla Firefox

⚠️ نوع التهديد

Exploit

🔗 CVE ID

CVE-2026-8959

📡 المصدر

VulnCheck

✅ الحلول والتخفيف

Refer to CVE-2026-8959 NVD advisory

🔗 المصدر الأصلي ← 📘 NVD ← ⚡ CISA KEV ←