CVE-2026-92014

EUVD-2026-78477
Privilege escalation due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox ESR 115.41, Firefox ESR 140.16, and Thunderbird 140.16.
Classic Buffer Overflow
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
mozillaCNA
8.8 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 15.07%
Affected Products (NVD)
VendorProductVersion
mozillafirefox
𝑥
< 115.41.0
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).
VendorProductVersionSource
mozillafirefox
116.0 ≤
𝑥
< 140.16.0
CNA
mozillafirefox_esr
𝑥
< 115.41.0
CNA
mozillafirefox_esr
116.0 ≤
𝑥
< 140.16.0
CNA
mozillathunderbird
𝑥
< 140.16.0
CNA
mozillathunderbird_esr
𝑥
< 140.16.0
CNA
Debian logo
Debian Releases
Debian Product
Codename
firefox-esr
bookworm
vulnerable
bookworm (security)
153.5.1esr-1~deb12u1
fixed
forky
153.5.0esr-1
fixed
sid
153.5.1esr-1
fixed
trixie
vulnerable
trixie (security)
153.5.1esr-1~deb13u1
fixed
thunderbird
bookworm
vulnerable
bookworm (security)
1:140.17.0esr-1~deb12u1
fixed
forky
1:153.5.0esr-1
fixed
sid
1:153.5.1esr-1
fixed
trixie
vulnerable
trixie (security)
1:140.17.0esr-1~deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
firefox
jammy
not-affected
noble
not-affected
resolute
not-affected
thunderbird
jammy
needed
noble
not-affected
resolute
not-affected
mozjs38
bionic
needs-triage
jammy
dne
noble
dne
resolute
dne
mozjs52
bionic
ignored
focal
ignored
jammy
dne
noble
dne
resolute
dne
mozjs68
focal
ignored
jammy
dne
noble
dne
resolute
dne
mozjs78
jammy
ignored
noble
dne
resolute
dne
mozjs91
jammy
ignored
noble
dne
resolute
dne
mozjs102
jammy
ignored
noble
ignored
resolute
dne
mozjs115
jammy
dne
noble
ignored
resolute
dne
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
firefox
RHEL 9
0:140.16.0-1.el9_8
fixed
firefox-x11
RHEL 9
0:140.16.0-1.el9_8
fixed
thunderbird
RHEL 9
0:140.16.0-1.el9_8
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
firefox
Amazon Linux 2023
0:140.17.0-1.amzn2023.0.1
fixed
firefox-debuginfo
Amazon Linux 2023
0:140.17.0-1.amzn2023.0.1
fixed
firefox-debugsource
Amazon Linux 2023
0:140.17.0-1.amzn2023.0.1
fixed
thunderbird
Amazon Linux 2
0:140.16.0-1.amzn2.0.1
fixed