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By the Year

In 2022 there have been 0 vulnerabilities in Qt . Last year Qt had 2 security vulnerabilities published. Right now, Qt is on track to have less security vulnerabilities in 2022 than it did last year.

Year Vulnerabilities Average Score
2022 0 0.00
2021 2 7.65
2020 5 7.48
2019 1 5.50
2018 6 7.98

It may take a day or so for new Qt vulnerabilities to show up in the stats or in the list of recent security vulnerabilties. Additionally vulnerabilities may be tagged under a different product or component name.

Recent Qt Security Vulnerabilities

Qt 5.0.0 through 6.1.2 has an out-of-bounds write in QOutlineMapper::convertPath (called

CVE-2021-38593 7.5 - High - August 12, 2021

Qt 5.0.0 through 6.1.2 has an out-of-bounds write in QOutlineMapper::convertPath (called from QRasterPaintEngine::fill and QPaintEngineEx::stroke).

Memory Corruption

An issue has been fixed in Qt versions 5.14.0 where QPluginLoader attempts to load plugins relative to the working directory

CVE-2020-24742 7.8 - High - August 09, 2021

An issue has been fixed in Qt versions 5.14.0 where QPluginLoader attempts to load plugins relative to the working directory, allowing attackers to execute arbitrary code via crafted files.

Uncontrolled search path in the QT Library before 5.14.0, 5.12.7 and 5.9.10 may

CVE-2020-0570 7.3 - High - September 14, 2020

Uncontrolled search path in the QT Library before 5.14.0, 5.12.7 and 5.9.10 may allow an authenticated user to potentially enable elevation of privilege via local access.

Untrusted Path

An issue was discovered in Qt through 5.12.9, and 5.13.x through 5.15.x before 5.15.1

CVE-2020-17507 5.3 - Medium - August 12, 2020

An issue was discovered in Qt through 5.12.9, and 5.13.x through 5.15.x before 5.15.1. read_xbm_body in gui/image/qxbmhandler.cpp has a buffer over-read.

Out-of-bounds Read

Qt 5.12.2 through 5.14.2, as used in unofficial builds of Mumble 1.3.0 and other products, mishandles OpenSSL's error queue

CVE-2020-13962 7.5 - High - June 09, 2020

Qt 5.12.2 through 5.14.2, as used in unofficial builds of Mumble 1.3.0 and other products, mishandles OpenSSL's error queue, which can cause a denial of service to QSslSocket users. Because errors leak in unrelated TLS sessions, an unrelated session may be disconnected when any handshake fails. (Mumble 1.3.1 is not affected, regardless of the Qt version.)

setMarkdown in Qt before 5.14.2 has a use-after-free related to QTextMarkdownImporter::insertBlock.

CVE-2020-12267 9.8 - Critical - April 27, 2020

setMarkdown in Qt before 5.14.2 has a use-after-free related to QTextMarkdownImporter::insertBlock.

Dangling pointer

In Qt through 5.14.1, the WebSocket implementation accepts up to 2GB for frames and 2GB for messages

CVE-2018-21035 7.5 - High - February 28, 2020

In Qt through 5.14.1, the WebSocket implementation accepts up to 2GB for frames and 2GB for messages. Smaller limits cannot be configured. This makes it easier for attackers to cause a denial of service (memory consumption).

Allocation of Resources Without Limits or Throttling

An issue was discovered in Qt 5.11

CVE-2018-19872 5.5 - Medium - March 21, 2019

An issue was discovered in Qt 5.11. A malformed PPM image causes a division by zero and a crash in qppmhandler.cpp.

Divide By Zero

An issue was discovered in Qt before 5.11.3

CVE-2018-19869 6.5 - Medium - December 26, 2018

An issue was discovered in Qt before 5.11.3. A malformed SVG image causes a segmentation fault in qsvghandler.cpp.

Improper Input Validation

An issue was discovered in Qt before 5.11.3

CVE-2018-19870 8.8 - High - December 26, 2018

An issue was discovered in Qt before 5.11.3. A malformed GIF image causes a NULL pointer dereference in QGifHandler resulting in a segmentation fault.

NULL Pointer Dereference

An issue was discovered in Qt before 5.11.3

CVE-2018-19871 6.5 - Medium - December 26, 2018

An issue was discovered in Qt before 5.11.3. There is QTgaFile Uncontrolled Resource Consumption.

Resource Exhaustion

An issue was discovered in Qt before 5.11.3

CVE-2018-19873 9.8 - Critical - December 26, 2018

An issue was discovered in Qt before 5.11.3. QBmpHandler has a buffer overflow via BMP data.

Buffer Overflow

QXmlStream in Qt 5.x before 5.11.3 has a double-free or corruption during parsing of a specially crafted illegal XML document.

CVE-2018-15518 8.8 - High - December 26, 2018

QXmlStream in Qt 5.x before 5.11.3 has a double-free or corruption during parsing of a specially crafted illegal XML document.

Double-free

A keystroke logging issue was discovered in Virtual Keyboard in Qt 5.7.x

CVE-2018-19865 7.5 - High - December 05, 2018

A keystroke logging issue was discovered in Virtual Keyboard in Qt 5.7.x, 5.8.x, 5.9.x, 5.10.x, and 5.11.x before 5.11.3.

Insertion of Sensitive Information into Log File

ownCloud Desktop Client before 2.0.1, when compiled with a Qt release after 5.3.x, does not call QNetworkReply::ignoreSslErrors with the list of errors to be ignored

CVE-2015-7298 - October 26, 2015

ownCloud Desktop Client before 2.0.1, when compiled with a Qt release after 5.3.x, does not call QNetworkReply::ignoreSslErrors with the list of errors to be ignored, which makes it easier for remote attackers to conduct man-in-the-middle (MITM) attacks by leveraging a server using a self-signed certificate. NOTE: this vulnerability exists because of a partial CVE-2015-4456 regression.

Multiple buffer overflows in gui/image/qbmphandler.cpp in the QtBase module in Qt before 4.8.7 and 5.x before 5.4.2

CVE-2015-1858 - May 12, 2015

Multiple buffer overflows in gui/image/qbmphandler.cpp in the QtBase module in Qt before 4.8.7 and 5.x before 5.4.2 allow remote attackers to cause a denial of service (segmentation fault and crash) and possibly execute arbitrary code via a crafted BMP image.

Buffer Overflow

Multiple buffer overflows in plugins/imageformats/ico/qicohandler.cpp in the QtBase module in Qt before 4.8.7 and 5.x before 5.4.2

CVE-2015-1859 - May 12, 2015

Multiple buffer overflows in plugins/imageformats/ico/qicohandler.cpp in the QtBase module in Qt before 4.8.7 and 5.x before 5.4.2 allow remote attackers to cause a denial of service (segmentation fault and crash) and possibly execute arbitrary code via a crafted ICO image.

Buffer Overflow

Multiple buffer overflows in gui/image/qgifhandler.cpp in the QtBase module in Qt before 4.8.7 and 5.x before 5.4.2

CVE-2015-1860 - May 12, 2015

Multiple buffer overflows in gui/image/qgifhandler.cpp in the QtBase module in Qt before 4.8.7 and 5.x before 5.4.2 allow remote attackers to cause a denial of service (segmentation fault) and possibly execute arbitrary code via a crafted GIF image.

Buffer Overflow

The GIF decoder in QtGui in Qt before 5.3

CVE-2014-0190 - May 08, 2014

The GIF decoder in QtGui in Qt before 5.3 allows remote attackers to cause a denial of service (NULL pointer dereference) via invalid width and height values in a GIF image.

NULL Pointer Dereference

QXmlSimpleReader in Qt before 5.2

CVE-2013-4549 - December 23, 2013

QXmlSimpleReader in Qt before 5.2 allows context-dependent attackers to cause a denial of service (memory consumption) via an XML Entity Expansion (XEE) attack.

Improper Input Validation

The QSslSocket::sslErrors function in Qt before 4.6.5, 4.7.x before 4.7.6, 4.8.x before 4.8.5, when using certain versions of openSSL, uses an "incompatible structure layout"

CVE-2012-6093 - February 24, 2013

The QSslSocket::sslErrors function in Qt before 4.6.5, 4.7.x before 4.7.6, 4.8.x before 4.8.5, when using certain versions of openSSL, uses an "incompatible structure layout" that can read memory from the wrong location, which causes Qt to report an incorrect error when certificate validation fails and might cause users to make unsafe security decisions to accept a certificate.

Cryptographic Issues

The XMLHttpRequest object in Qt before 4.8.4 enables http redirection to the file scheme, which

CVE-2012-5624 - February 24, 2013

The XMLHttpRequest object in Qt before 4.8.4 enables http redirection to the file scheme, which allows man-in-the-middle attackers to force the read of arbitrary local files and possibly obtain sensitive information via a file: URL to a QML application.

Information Disclosure

The QSharedMemory class in Qt 5.0.0, 4.8.x before 4.8.5, 4.7.x before 4.7.6, and other versions including 4.4.0 uses weak permissions (world-readable and world-writable) for shared memory segments, which

CVE-2013-0254 - February 06, 2013

The QSharedMemory class in Qt 5.0.0, 4.8.x before 4.8.5, 4.7.x before 4.7.6, and other versions including 4.4.0 uses weak permissions (world-readable and world-writable) for shared memory segments, which allows local users to read sensitive information or modify critical program data, as demonstrated by reading a pixmap being sent to an X server.

Permissions, Privileges, and Access Controls

QSslSocket in Qt before 4.7.0-rc1 recognizes a wildcard IP address in the subject's Common Name field of an X.509 certificate, which might

CVE-2010-5076 - June 29, 2012

QSslSocket in Qt before 4.7.0-rc1 recognizes a wildcard IP address in the subject's Common Name field of an X.509 certificate, which might allow man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.

Improper Input Validation

Buffer overflow in the TIFF reader in gui/image/qtiffhandler.cpp in Qt 4.7.4

CVE-2011-3194 - June 16, 2012

Buffer overflow in the TIFF reader in gui/image/qtiffhandler.cpp in Qt 4.7.4 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via the TIFFTAG_SAMPLESPERPIXEL tag in a greyscale TIFF image with multiple samples per pixel.

Buffer Overflow

Heap-based buffer overflow in the Lookup_MarkMarkPos function in the HarfBuzz module (harfbuzz-gpos.c), as used by Qt before 4.7.4 and Pango

CVE-2011-3193 - June 16, 2012

Heap-based buffer overflow in the Lookup_MarkMarkPos function in the HarfBuzz module (harfbuzz-gpos.c), as used by Qt before 4.7.4 and Pango, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted font file.

Memory Corruption

The QSslSocketBackendPrivate::transmit function in src_network_ssl_qsslsocket_openssl.cpp in Qt 4.6.3 and earlier

CVE-2010-2621 - July 02, 2010

The QSslSocketBackendPrivate::transmit function in src_network_ssl_qsslsocket_openssl.cpp in Qt 4.6.3 and earlier allows remote attackers to cause a denial of service (infinite loop) via a malformed request.

Improper Input Validation

src/network/ssl/qsslcertificate.cpp in Nokia Trolltech Qt 4.x does not properly handle a '\0' character in a domain name in the Subject Alternative Name field of an X.509 certificate, which

CVE-2009-2700 - September 02, 2009

src/network/ssl/qsslcertificate.cpp in Nokia Trolltech Qt 4.x does not properly handle a '\0' character in a domain name in the Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.

Improper Input Validation

Integer overflow in Qt 3.3 before 3.3.7, 4.1 before 4.1.5, and 4.2 before 4.2.1, as used in the KDE khtml library, kdelibs 3.1.3, and possibly other packages

CVE-2006-4811 - October 18, 2006

Integer overflow in Qt 3.3 before 3.3.7, 4.1 before 4.1.5, and 4.2 before 4.2.1, as used in the KDE khtml library, kdelibs 3.1.3, and possibly other packages, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted pixmap image.

Numeric Errors

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