CVE-2026-100802: firefox before 157.0.0 (exclusive); +1 more affected products

CVE-2026-100802. CVSS 3.1 base score 4.3 (MEDIUM, Source advisory). EPSS 0.00257 (percentile 0.16309), scored 19-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 · User interaction required

What an attacker can do

Source advisory’s CVSS 3.1 assessment (base score 4.3/10) rates confidentiality and integrity impact as none; availability impact as low. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 19-Oct-2026 17:59 UTC

CWE: CWE-457
CCR priority: 17.3 /100 (P5)
CVSS 3.1: 4.3 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L · Source advisory
EPSS: 0.00257 · percentile 0.16309 · 2026-10-19
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-19 17:57:47.606446+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-100802.html