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CVE-2026-103645

Integer overflow vulnerability in QTextCodec fromUnicode() and toUnicode() impacts Qt

An integer overflow vulnerability in the Qt QTextCodec fromUnicode() and toUnicode() functionality of the Qt 5 Core Compatibility APIs module (Qt 6) and the Qt Core module (Qt 5). Only builds where Qt is compiled with ICU support are affected.

CVSS 4.0 · 1.1 Low EPSS n/a KEV · Not listed
Vendors
Qt
Products
Qt Qt5compat Qtbase
CVE-2026-97845

Uncontrolled recursion vulnerability in QXmlSimpleReader XML parsing impacts Qt

An uncontrolled recursion vulnerability has been discovered in the Qt QXmlSimpleReader XML parsing functionality of the Qt 5 Core Compatibility APIs module (Qt 6) and the Qt XML module (Qt 5).

CVSS 4.0 · 4.3 Medium EPSS n/a KEV · Not listed
Vendors
Qt
Products
Qt Qt5compat Qtbase
CVE-2026-107479

Integer truncation vulnerability in QTextCodec conversion functions impacts Qt Framework

An integer truncation vulnerability in the QTextCodec conversion functions of the Qt 5 Core Compatibility APIs module impacts the Qt Framework. An application using the affected functionality could crash.

CVSS 4.0 · 1.7 Low EPSS < 1% KEV · Not listed
Vendors
Qt
Products
Qt Qt5compat Qtbase
CVE-2026-107590

Out-of-bounds write vulnerability in QTextCodec iconv-based encoding impacts Qt

An out-of-bounds write vulnerability in the Qt QTextCodec iconv-based encoding of the Qt 5 Compatibility APIs module (Qt Core in Qt 5 and earlier) impacts Qt. Under certain conditions, encoding text with QTextCodec may write outside an internal buffer. This can cause the application to crash and may affect data integrity.

CVSS 4.0 · 1.9 Low EPSS < 1% KEV · Not listed
Vendors
Qt
Products
Qt Qt5compat Qtbase
CVE-2026-107472

Out-of-bounds read vulnerability in QTextCodec TSCII encoding impacts Qt

An out-of-bounds read vulnerability in the QTextCodec TSCII encoding of the Qt 5 Compatibility APIs module (Qt Core in Qt 5 and earlier) impacts Qt. Applications that convert text to the TSCII encoding through QTextCodec may read memory outside the input buffer, which can cause the application to crash or misinterpret the data.

CVSS 4.0 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Qt
Products
Qt Qt5compat Qtbase
CVE-2026-100140

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.

CVSS 4.0 · 1.9 Low EPSS < 1% KEV · Not listed
Vendors
Qt
Products
Qt Qt5compat
CVE-2026-101201

QBinaryJson::fromBinaryData() integer overflow leading to OOB read

A malformed header in the binary file fed to QBinaryJson::fromBinaryData() can cause undefined behaviour because of out-of-bounds read.

CVSS 4.0 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Qt
Products
Qt Qt5compat Qtbase