CVE-2026-45186

EUVD-2026-28985
In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
2.9 LOW
LOCAL
HIGH
NONE
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 36.47%
Affected Products (NVD)
VendorProductVersion
libexpat_projectlibexpat
𝑥
< 2.8.1
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
Red HatRed Hat Enterprise Linux 10
0:2.7.3-1.el10_2.1 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 8
0:2.5.0-2.el8_10 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 9
0:2.5.0-6.el9_8.1 ≤
𝑥
< *
ADP
Red HatRed Hat Discovery 2
1782159791 ≤
𝑥
< *
ADP
Red HatRed Hat Discovery 2
1782166952 ≤
𝑥
< *
ADP
Red HatRed Hat Update Infrastructure 5
1781525684 ≤
𝑥
< *
ADP
Red HatRed Hat Update Infrastructure 5
1781525671 ≤
𝑥
< *
ADP
Red HatRed Hat Update Infrastructure 5
1781525693 ≤
𝑥
< *
ADP
Red HatRed Hat Update Infrastructure 5
1781525739 ≤
𝑥
< *
ADP
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP
V3.1.5 ≤
𝑥
< V3.1.6
ADP
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP
V3.1.5 ≤
𝑥
< V3.1.6
ADP
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
V3.1.5 ≤
𝑥
< V3.1.6
ADP
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
V3.1.5 ≤
𝑥
< V3.1.6
ADP
SiemensSIPLUS S7-1500 CPU 1518-4 PN/DP MFP
V3.1.5 ≤
𝑥
< V3.1.6
ADP
Debian logo
Debian Releases
Debian Product
Codename
expat
bookworm
vulnerable
bookworm (security)
vulnerable
bullseye
vulnerable
bullseye (security)
vulnerable
forky
2.8.2-1
fixed
sid
2.8.2-1
fixed
trixie
vulnerable
trixie (security)
2.8.2-1~deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
expat
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
trusty
needs-triage
xenial
needs-triage
xmlrpc-c
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
trusty
needs-triage
xenial
ignored
wbxml2
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
xenial
ignored
swish-e
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
xenial
ignored
cadaver
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
xenial
ignored
tdom
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
xenial
ignored
apache2
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
not-affected
questing
not-affected
resolute
not-affected
trusty
not-affected
xenial
not-affected
apr-util
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
not-affected
questing
not-affected
resolute
not-affected
trusty
not-affected
xenial
not-affected
ayttm
jammy
dne
noble
dne
questing
dne
resolute
dne
xenial
ignored
cableswig
jammy
dne
noble
dne
questing
dne
resolute
dne
xenial
ignored
cmake
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
not-affected
questing
not-affected
resolute
not-affected
xenial
not-affected
coin3
bionic
needs-triage
focal
not-affected
jammy
not-affected
noble
not-affected
questing
not-affected
resolute
not-affected
trusty
needs-triage
xenial
ignored
firefox
jammy
not-affected
noble
not-affected
questing
not-affected
resolute
not-affected
gdcm
bionic
needs-triage
focal
not-affected
jammy
not-affected
noble
not-affected
questing
not-affected
resolute
not-affected
trusty
not-affected
xenial
ignored
ghostscript
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
not-affected
questing
not-affected
resolute
not-affected
xenial
not-affected
insighttoolkit4
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
dne
questing
dne
resolute
dne
xenial
ignored
libxmltok
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
dne
resolute
dne
xenial
ignored
matanza
bionic
needs-triage
focal
ignored
jammy
ignored
noble
ignored
questing
ignored
resolute
ignored
xenial
ignored
smart
bionic
needs-triage
jammy
dne
noble
dne
questing
dne
resolute
dne
xenial
ignored
texlive-bin
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
not-affected
questing
not-affected
resolute
not-affected
xenial
not-affected
thunderbird
jammy
not-affected
noble
not-affected
questing
not-affected
resolute
not-affected
vnc4
bionic
needs-triage
jammy
dne
noble
dne
questing
dne
resolute
dne
trusty
needs-triage
xenial
ignored
vtk
jammy
dne
noble
dne
questing
dne
resolute
dne
trusty
needs-triage
xenial
ignored
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
expat
RHEL 8
0:2.5.0-2.el8_10
fixed
RHEL 9
0:2.5.0-6.el9_8.1
fixed
expat-devel
RHEL 8
0:2.5.0-2.el8_10
fixed
RHEL 9
0:2.5.0-6.el9_8.1
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
firefox
Amazon Linux 2023
0:140.10.2-1.amzn2023.0.3
fixed
firefox-debuginfo
Amazon Linux 2023
0:140.10.2-1.amzn2023.0.3
fixed
firefox-debugsource
Amazon Linux 2023
0:140.10.2-1.amzn2023.0.3
fixed
thunderbird
Amazon Linux 2
0:140.10.2-1.amzn2.0.2
fixed
Azure Linux logo
Azure Linux Releases
Azure Package
Release
expat
Azure Linux 3.0
0:2.8.2-1.azl3
fixed