CVE-2026-50219

EUVD-2026-34206
libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_GetBuffer, XML_Parse, XML_ParseBuffer, XML_ParserFree, or XML_ParserReset from within handlers in cases of a policy violation. Thus, a use-after-free can occur,
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
4.9 MEDIUM
LOCAL
HIGH
NONE
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 7.16%
Affected Products (NVD)
VendorProductVersion
libexpat_projectlibexpat
𝑥
< 2.8.2
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
expat
bookworm
vulnerable
bookworm (security)
2.5.0-1+deb12u4
fixed
forky
2.9.0-1
fixed
sid
2.9.0-1
fixed
trixie
2.8.3-1~deb13u1
fixed
trixie (security)
2.8.3-1~deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
expat
bionic
Fixed 2.2.5-3ubuntu0.9+esm4
released
focal
Fixed 2.2.9-1ubuntu0.8+esm2
released
jammy
Fixed 2.4.7-1ubuntu0.8
released
noble
Fixed 2.6.1-2ubuntu0.5
released
questing
ignored
resolute
Fixed 2.7.4-1ubuntu0.1
released
trusty
Fixed 2.1.0-4ubuntu1.4+esm12
released
xenial
Fixed 2.1.0-7ubuntu0.16.04.5+esm13
released
xmlrpc-c
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
trusty
needs-triage
xenial
needs-triage
vnc4
bionic
needs-triage
jammy
dne
noble
dne
questing
dne
resolute
dne
trusty
needs-triage
xenial
needs-triage
wbxml2
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
xenial
needs-triage
swish-e
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
xenial
needs-triage
insighttoolkit4
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
dne
questing
dne
resolute
dne
xenial
needs-triage
cadaver
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
xenial
needs-triage
gdcm
bionic
needs-triage
focal
not-affected
jammy
not-affected
noble
not-affected
questing
not-affected
resolute
not-affected
trusty
not-affected
xenial
needs-triage
ayttm
jammy
dne
noble
dne
questing
dne
resolute
dne
xenial
needs-triage
cableswig
jammy
dne
noble
dne
questing
dne
resolute
dne
xenial
needs-triage
coin3
bionic
needs-triage
focal
not-affected
jammy
not-affected
noble
not-affected
questing
not-affected
resolute
not-affected
trusty
needs-triage
xenial
needs-triage
matanza
bionic
needs-triage
focal
ignored
jammy
ignored
noble
ignored
questing
ignored
resolute
ignored
xenial
needs-triage
tdom
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
xenial
needs-triage
vtk
jammy
dne
noble
dne
questing
dne
resolute
dne
trusty
needs-triage
xenial
needs-triage
smart
bionic
needs-triage
jammy
dne
noble
dne
questing
dne
resolute
dne
xenial
needs-triage
libxmltok
bionic
needed
focal
needed
jammy
needed
noble
needed
questing
dne
resolute
dne
xenial
needed
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
cmake
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
not-affected
questing
not-affected
resolute
not-affected
xenial
not-affected
firefox
jammy
not-affected
noble
not-affected
questing
not-affected
resolute
not-affected
ghostscript
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
not-affected
questing
not-affected
resolute
not-affected
xenial
not-affected
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
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
expat
suse enterprise desktop 15 SP7
2.8.5-150700.3.15.1
fixed
suse enterprise sap 12 SP5
2.8.5-21.55.1
fixed
suse enterprise sap 15 SP4
2.8.5-150400.3.40.1
fixed
suse enterprise sap 15 SP5
2.8.5-150400.3.40.1
fixed
suse enterprise sap 15 SP6
2.8.5-150400.3.40.1
fixed
suse enterprise sap 15 SP7
2.8.5-150700.3.15.1
fixed
suse enterprise server 12 SP3
2.8.5-21.55.1
fixed
suse enterprise server 12 SP5
2.8.5-21.55.1
fixed
suse enterprise server 15 SP4
2.8.5-150400.3.40.1
fixed
suse enterprise server 15 SP5
2.8.5-150400.3.40.1
fixed
suse enterprise server 15 SP6
2.8.5-150400.3.40.1
fixed
suse enterprise server 15 SP7
2.8.5-150700.3.15.1
fixed
libexpat-devel
suse enterprise desktop 15 SP7
2.8.5-150700.3.15.1
fixed
suse enterprise sap 12 SP5
2.8.5-21.55.1
fixed
suse enterprise sap 15 SP4
2.8.5-150400.3.40.1
fixed
suse enterprise sap 15 SP5
2.8.5-150400.3.40.1
fixed
suse enterprise sap 15 SP6
2.8.5-150400.3.40.1
fixed
suse enterprise sap 15 SP7
2.8.5-150700.3.15.1
fixed
suse enterprise server 12 SP5
2.8.5-21.55.1
fixed
suse enterprise server 15 SP4
2.8.5-150400.3.40.1
fixed
suse enterprise server 15 SP5
2.8.5-150400.3.40.1
fixed
suse enterprise server 15 SP6
2.8.5-150400.3.40.1
fixed
suse enterprise server 15 SP7
2.8.5-150700.3.15.1
fixed
libexpat1
suse enterprise desktop 15 SP7
2.8.5-150700.3.15.1
fixed
suse enterprise sap 12 SP5
2.8.5-21.55.1
fixed
suse enterprise sap 15 SP4
2.8.5-150400.3.40.1
fixed
suse enterprise sap 15 SP5
2.8.5-150400.3.40.1
fixed
suse enterprise sap 15 SP6
2.8.5-150400.3.40.1
fixed
suse enterprise sap 15 SP7
2.8.5-150700.3.15.1
fixed
suse enterprise server 12 SP3
2.8.5-21.55.1
fixed
suse enterprise server 12 SP5
2.8.5-21.55.1
fixed
suse enterprise server 15 SP4
2.8.5-150400.3.40.1
fixed
suse enterprise server 15 SP5
2.8.5-150400.3.40.1
fixed
suse enterprise server 15 SP6
2.8.5-150400.3.40.1
fixed
suse enterprise server 15 SP7
2.8.5-150700.3.15.1
fixed
libexpat1-32bit
suse enterprise desktop 15 SP7
2.8.5-150700.3.15.1
fixed
suse enterprise sap 12 SP5
2.8.5-21.55.1
fixed
suse enterprise sap 15 SP4
2.8.5-150400.3.40.1
fixed
suse enterprise sap 15 SP5
2.8.5-150400.3.40.1
fixed
suse enterprise sap 15 SP6
2.8.5-150400.3.40.1
fixed
suse enterprise sap 15 SP7
2.8.5-150700.3.15.1
fixed
suse enterprise server 12 SP3
2.8.5-21.55.1
fixed
suse enterprise server 12 SP5
2.8.5-21.55.1
fixed
suse enterprise server 15 SP4
2.8.5-150400.3.40.1
fixed
suse enterprise server 15 SP5
2.8.5-150400.3.40.1
fixed
suse enterprise server 15 SP6
2.8.5-150400.3.40.1
fixed
suse enterprise server 15 SP7
2.8.5-150700.3.15.1
fixed
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
expat
RHEL 8
0:2.5.0-2.el8_10.2
fixed
RHEL 9
0:2.5.0-6.el9_8.3
fixed
expat-devel
RHEL 8
0:2.5.0-2.el8_10.2
fixed
RHEL 9
0:2.5.0-6.el9_8.3
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
expat
Amazon Linux 2023
0:2.8.3-1.amzn2023.0.1
fixed
expat-debuginfo
Amazon Linux 2023
0:2.8.3-1.amzn2023.0.1
fixed
expat-debugsource
Amazon Linux 2023
0:2.8.3-1.amzn2023.0.1
fixed
expat-devel
Amazon Linux 2023
0:2.8.3-1.amzn2023.0.1
fixed
expat-static
Amazon Linux 2023
0:2.8.3-1.amzn2023.0.1
fixed
firefox
Amazon Linux 2023
0:140.12.0-1.amzn2023.0.1
fixed
firefox-debuginfo
Amazon Linux 2023
0:140.12.0-1.amzn2023.0.1
fixed
firefox-debugsource
Amazon Linux 2023
0:140.12.0-1.amzn2023.0.1
fixed
thunderbird
Amazon Linux 2
0:140.12.0-1.amzn2.0.1
fixed
Azure Linux logo
Azure Linux Releases
Azure Package
Release
expat
Azure Linux 3.0
0:2.8.2-1.azl3
fixed
Common Weakness Enumeration
References
https://github.com/libexpat/libexpat/pull/1246