P4Verified

CVE-2026-100763: firefox before 157.0.0 (exclusive); +1 more affected products

CVE-2026-100763. CVSS 3.1 base score 9.1 (CRITICAL, Source advisory). EPSS 0.004 (percentile 0.32283), scored 12-Oct-2026.

Affected technology

firefox · before 157.0.0 (exclusive)
mozilla

thunderbird · before 157.0 (exclusive)
mozilla

Component: Not specified by the source

Attack conditions (Source advisory, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Source advisory’s CVSS 3.1 assessment (base score 9.1/10) rates confidentiality and availability impact as high; integrity impact as none. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 13-Oct-2026 20:18 UTC

CWE: CWE-119
CCR priority: 36.5 /100 (P4)
CVSS 3.1: 9.1 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H · Source advisory
EPSS: 0.004 · percentile 0.32283 · 2026-10-12
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-13 20:16:59.278043+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-100763.html