CVE-2026-100140

Integer overflow vulnerability in XML parsing functionality of Qt5Compat impacts Qt

1.9 LowFix available

An integer overflow vulnerability in the Qt XML parsing (Qt5Compat / QXmlSimpleReader) functionality of Qt.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Passive

What an attacker can affect

Confidentiality: None
Integrity: Low
Availability: High

Exploit likelihood

0.17%Unchanged since Nov 3, 2026

What each source reports

CVE List Score used 1.9

Integer overflow vulnerability in XML parsing functionality of Qt5Compat impacts Qt

An integer overflow vulnerability in the Qt XML parsing (Qt5Compat / QXmlSimpleReader) functionality of Qt.

Record: CVE-2026-100140
CVSS 4.0: 1.9 LowCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/R:U/U:Green
Weakness: CWE-190
Updated: 2026-11-02

EUVDEUVD-2026-115135 1.9

An integer overflow vulnerability in the Qt XML parsing (Qt5Compat / QXmlSimpleReader) functionality of Qt.

Record: EUVD-2026-115135
CVSS 4.0: 1.9 LowCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/R:U/U:Green
Updated: 2026-11-03

GitHub AdvisoriesGHSA-7695-pqx4-vc24 1.9

An integer overflow vulnerability in the Qt XML parsing (Qt5Compat / QXmlSimpleReader)...

An integer overflow vulnerability in the Qt XML parsing (Qt5Compat / QXmlSimpleReader) functionality of Qt.

Record: GHSA-7695-pqx4-vc24
CVSS 4.0: 1.9 LowCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/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:X/AU:X/R:U/V:X/RE:X/U:Green
Weakness: CWE-190
Updated: 2026-11-02

NVD 1.9

An integer overflow vulnerability in the Qt XML parsing (Qt5Compat / QXmlSimpleReader) functionality of Qt.

Record: CVE-2026-100140
CVSS 4.0: 1.9 LowCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/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:X/AU:X/R:U/V:X/RE:X/U:Green
Weakness: CWE-190
Updated: 2026-11-03

OSVDEBIAN-CVE-2026-100140 1.9

An integer overflow vulnerability in the Qt XML parsing (Qt5Compat / QXmlSimpleReader) functionality of Qt.

Record: DEBIAN-CVE-2026-100140
CVSS 4.0: 1.9 LowCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/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:X/AU:X/R:U/V:X/RE:X/U:Green
Updated: 2026-11-07

OSVUBUNTU-CVE-2026-100140 1.9

An integer overflow vulnerability in the Qt XML parsing (Qt5Compat / QXmlSimpleReader) functionality of Qt.

Record: UBUNTU-CVE-2026-100140
CVSS 4.0: 1.9 LowCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/R:U/U:Green
Updated: 2026-11-05

OSVopenSUSE-SU-2026:12442-1 No score

libQt6Core5Compat6-6.12.0-2.1 on GA media

These are all security issues fixed in the libQt6Core5Compat6-6.12.0-2.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2026:12442-1
Updated: 2026-11-06

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`qt6-5compat` Debian:12	All versions, plus listed versions 6.10.2-16.10.2-26.10.2-36.10.2-46.11.2-1 Show 21 moreShow less 6.11.2-26.11.2-36.4.2-16.4.2-26.4.2-36.4.2-46.6.1-16.6.1-26.6.2-16.6.2-26.7.2-16.7.2-26.7.2-36.8.2-16.8.2-26.8.2-36.9.1-16.9.1-26.9.2-16.9.2-26.9.2-3	None known
`qt6-5compat` Debian:13	All versions, plus listed versions 6.10.2-16.10.2-26.10.2-36.10.2-46.11.2-1 Show 8 moreShow less 6.11.2-26.11.2-36.8.2-36.9.1-16.9.1-26.9.2-16.9.2-26.9.2-3	None known
`qt6-5compat` Debian:14	All versions, plus listed versions 6.10.2-16.10.2-26.10.2-36.10.2-46.11.2-1 Show 8 moreShow less 6.11.2-26.11.2-36.8.2-36.9.1-16.9.1-26.9.2-16.9.2-26.9.2-3	None known
`qt6-5compat` Ubuntu:22.04:LTS	All versions, plus listed versions 6.2.2-56.2.4-1	None known
`qt6-5compat` Ubuntu:24.04:LTS	All versions, plus listed versions 6.4.2-36.4.2-46.4.2-4build16.4.2-4build26.4.2-4build3	None known
`qt6-5compat` Ubuntu:26.10	All versions, plus listed versions 6.10.2-16.10.2-36.10.2-46.11.2-1	None known
`qt6-5compat` Ubuntu:26.04:LTS	All versions, plus listed versions 6.9.2-16.9.2-36.9.2-3build16.10.2-1	None known
`qt6-qt5compat` openSUSE:Tumbleweed	before 6.12.0-2.1	6.12.0-2.1

History

History
Recorded	Changed	Sources
Nov 7, 2026	affected, aliases, references	OSV
Nov 6, 2026	affected, aliases, facts, references	OSV
Nov 4, 2026	affected, aliases, facts, references	EUVD, NVD, OSV
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-100140 is a low vulnerability (CVSS 1.9) in Qt, published November 2, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.17%, the 5th percentile. Fixed in qt6-qt5compat 6.12.0-2.1.

References

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