CVE-2026-9309: mozilla firefox

csirt@kutim:~/threat-intel/cve/CVE-2026-9309

CVSS 5.4 · Medium EPSS 0,26%

Kerentanan Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') pada mozilla firefox. Skor CVSS 3.1 5.4 (Medium) menurut CISA ADP.

Deskripsi (NVD)

Firefox for iOS Reader View did not properly escape HTML tags in JSON-LD metadata. A malicious page could inject markup that changed Reader View behavior and leaked sensitive URL parameters. These parameters could then be used to access internal pages, potentially resulting in arbitrary JavaScript execution in an internal origin. This vulnerability was fixed in Firefox for iOS 151.2.

Rincian

Terbit di NVD: 1 Juni 2026
Terakhir diubah: 22 Juli 2026
Status NVD: Analyzed
CVSS 3.1: 5.4 (Medium), sumber CISA ADP
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
EPSS (30 hari): 0,26% peluang dieksploitasi; lebih tinggi dari 16,8% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
mozilla	firefox	Semua versi sebelum 151.2

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://www.mozilla.org/security/advisories/mfsa2026-53/ advisory vendor
https://bugzilla.mozilla.org/show_bug.cgi?id=2036573 permissions required

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:11 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.