CVE-2026-16389

EUVD-2026-46226
Incorrect boundary conditions, integer overflow in the Libraries component in NSS. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 44.78%
Affected Products (NVD)
VendorProductVersion
mozillafirefox
𝑥
< 153.0.0
mozillathunderbird
𝑥
< 153.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
firefox
sid
154.0.1-1
fixed
nss
bookworm
vulnerable
bookworm (security)
2:3.87.1-1+deb12u4
fixed
forky
2:3.127-1
fixed
sid
2:3.127-1
fixed
trixie
vulnerable
trixie (security)
2:3.110-1+deb13u4
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
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://bugzilla.mozilla.org/show_bug.cgi?id=2043887
https://www.mozilla.org/security/advisories/mfsa2026-68/
https://www.mozilla.org/security/advisories/mfsa2026-71/
https://lists.debian.org/debian-lts-announce/2026/08/msg00019.html