Other issue in Firefox Focus for Android

published 2026-09-01 2 mo ago modified 2026-09-03 2 mo ago also EUVD-2026-69083

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 39%
public exploits: 0; none known

Other issue in Firefox Focus for Android. This vulnerability was fixed in Firefox 155.

Patch / fix

fixed in 1 distros 1

mozilla firefox_mobile 155.0

MozillaFirefox openSUSE Tumbleweed 155.0-1.1

opensuse advisories openSUSE-SU-2026:11677-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-84135 updated 2026-11-07 cvss 3.4

firefox: Other issue in Firefox Focus for Android

Red Hat Enterprise Linux 6 firefox Red Hat Enterprise Linux 7 firefox Red Hat Enterprise Linux 8 firefox Red Hat Enterprise Linux 9 firefox, firefox-x11 Red Hat Enterprise Linux 10 firefox, rhel10/firefox-flatpak
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: total
Assessed: 2 mo ago (2026-09-03)

Exploit prediction

0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Mozilla Firefox

Classification

Weakness

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-20 Improper Input Validation

References

mozilla.org /security/advisories/mfsa2026-82/
vendor-advisory
bugzilla.mozilla.org /show_bug.cgi?id=2046661
issue-tracking, permissions-required

Sources

CVE List CVE-2026-84135
NVD CVE-2026-84135

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary