CVE-2026-5732: firefox before 140.9.1 (exclusive), before 149.0.2 (exclusive); +20 more affected products

CVE-2026-5732. CVSS 3.1 base score 8.8 (HIGH, Source advisory). EPSS 0.00665 (percentile 0.51192), scored 22-Oct-2026.

Affected technology

firefox · before 140.9.1 (exclusive)
mozilla

firefox · before 149.0.2 (exclusive)
mozilla

Red Hat Enterprise Linux 10 · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux 6 · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux 7 · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux Server (v. 7 ELS) · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux AppStream EUS (v. 10.0) · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux AppStream (v. 10) · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux AppStream (v. 8) · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux AppStream AUS (v. 8.2) · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux AppStream AUS (v.8.4) · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux AppStream AUS (v.8.6) · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux AppStream E4S (v.8.6) · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux AppStream TUS (v.8.6) · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux AppStream E4S (v.8.8) · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux AppStream TUS (v.8.8) · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux AppStream E4S (v.9.0) · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux AppStream E4S (v.9.2) · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux AppStream EUS (v.9.4) · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux AppStream EUS (v.9.6) · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux AppStream (v. 9) · Exact affected versions not specified by the source
Red Hat

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 8.8/10) rates confidentiality, integrity and availability impact as high. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 24-Oct-2026 15:08 UTC

CWE: CWE-190
CCR priority: 35.4 /100 (P4)
CVSS 3.1: 8.8 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H · Source advisory
EPSS: 0.00665 · percentile 0.5126 · 2026-10-24
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-24 15:09:16.138216+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-24 15:07:27.951960+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-5732.html