P4Verified

CVE-2026-100817: firefox before 157.0.0 (exclusive); +1 more affected products

CVE-2026-100817. CVSS 3.1 base score 5.4 (MEDIUM, Source advisory). EPSS 0.0021 (percentile 0.10233), scored 2026-10-05.

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 · User interaction required

What an attacker can do

Source advisory’s CVSS 3.1 assessment (base score 5.4/10) rates confidentiality and integrity impact as low; availability impact as none. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 2026-10-06 17:56:31.407329+00:00

CCR priority: 21.7 /100 (P4)
CVSS 3.1: 5.4 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N · Source advisory
EPSS: 0.0021 · percentile 0.10233 · 2026-10-05
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-06 17:55:17.257073+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-100817.html