CVE-2026-8959

Katalog CVE

CVSS 9.6 · Critical EPSS 0,45%

Kerentanan Improper Input Validation pada mozilla firefox, mozilla thunderbird. Skor CVSS 3.1 9.6 (Critical) menurut CISA ADP.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

19 Mei 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

9.6 (Critical), sumber CISA ADP
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-20: Improper Input Validation
CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-693: Protection Mechanism Failure

EPSS (30 hari)

0,45% peluang dieksploitasi; lebih tinggi dari 37,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://www.mozilla.org/security/advisories/mfsa2026-46/ advisory vendor
• https://www.mozilla.org/security/advisories/mfsa2026-48/ advisory vendor
• https://www.mozilla.org/security/advisories/mfsa2026-50/ advisory vendor
• https://www.mozilla.org/security/advisories/mfsa2026-51/ advisory vendor
• https://bugzilla.mozilla.org/show_bug.cgi?id=2034754 permissions required