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

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
qt qt unaffected
Version Status Constraints
6.0.0 affected ≤ 6.8.9
6.9.0 affected ≤ 6.11.2
6.12.0 affected —

No data.

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Project Subscriptions

Vendors Products
Qt Subscribe
Qt Subscribe
Qt5compat Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://codereview.qt-project.org/c/qt/qt5compat/+/764751 cve-icon cve-icon
https://codereview.qt-project.org/c/qt/qt5compat/+/768900 cve-icon cve-icon
https://codereview.qt-project.org/c/qt/qt5compat/+/768901 cve-icon cve-icon
https://codereview.qt-project.org/c/qt/qt5compat/+/768902 cve-icon cve-icon
https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-100140: cve-icon cve-icon
History

Mon, 02 Nov 2026 12:00:00 +0000

Type Values Removed Values Added
Description An integer overflow vulnerability in the Qt XML parsing (Qt5Compat / QXmlSimpleReader) functionality of Qt.
Title Integer overflow vulnerability in XML parsing functionality of Qt5Compat impacts Qt
First Time appeared Qt
Qt qt
Qt qt5compat
Weaknesses CWE-190
CPEs cpe:2.3:a:qt:qt5compat:*:*:*:*:*:*:*:*
cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*
Vendors & Products Qt
Qt qt
Qt qt5compat
References
Metrics cvssV4_0

{'score': 1.9, 'vector': 'CVSS: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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Qt

Published:

Updated: 2026-11-02T11:44:37.391Z

Reserved: 2026-09-25T11:26:30.758Z

Link: CVE-2026-100140

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-02T12:16:58.910

Modified: 2026-11-02T12:16:58.910

Link: CVE-2026-100140

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses