CVE-2026-78253

EUVD-2026-85238
Uncontrolled recursion in QXmlStreamReader::readElementText() in Qt Group Qt allows attackers to cause a denial of service (application crash via stack exhaustion) via a crafted XML document.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
QtCNA
2.3 LOW
NETWORK
LOW
NONE
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:N/R:U/V:X/RE:L/U:Green
Base Score
CVSS 3.x
EPSS Score
Percentile: 37.27%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).
VendorProductVersionSource
qtqt
5.0.0 ≤
𝑥
≤ 6.8.8
CNA
qtqt
6.9.0 ≤
𝑥
≤ 6.11.1
CNA
Debian logo
Debian Releases
Debian Product
Codename
qt6-base
bookworm
postponed
forky
6.11.2+dfsg-7
fixed
sid
6.11.2+dfsg-7
fixed
trixie
no-dsa
qtbase-opensource-src
bookworm
postponed
forky
5.15.19+dfsg-6
fixed
sid
5.15.19+dfsg-7
fixed
trixie
no-dsa
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
qt6-base
jammy
needs-triage
noble
needs-triage
resolute
needs-triage
stonking
needs-triage
qtbase-opensource-src
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
resolute
needs-triage
stonking
needs-triage
xenial
needs-triage
Azure Linux logo
Azure Linux Releases
Azure Package
Release
qtbase
Azure Linux 3.0
0:6.6.3-7.azl3
fixed
Common Weakness Enumeration
References
https://codereview.qt-project.org/c/qt/qtbase/+/754345