Qt is a widely embedded cross-platform application development framework whose vulnerability footprint, despite a compact product portfolio, spans extensive deployments across consumer, enterprise, and embedded systems where graphical rendering and XML processing occur. The vulnerability profile concentrates in core components such as QtBase, QtSVG, QtWebKit, and XML parsing utilities, with a recurring pattern of memory-safety and input-validation weaknesses including buffer overflows, out-of-bounds writes, and integer overflow conditions characteristic of large C++ codebases handling untrusted content. A meaningful share of the vendor's disclosures reach serious severity, reflecting the role these libraries play in processing potentially adversarial graphical and structured-data inputs. Defenders should treat Qt framework updates as infrastructure-level patches affecting downstream applications rather than tracking the framework alone, since a single flaw in core utilities propagates across all dependent software; current exploitation activity and exposure counts are shown alongside this summary.
The number and severity of CVEs published that impact products developed by Qt over time
Signals from CVEs in this vendor scope (67 CVEs).
67 CVEs · Highest risk first
| CVE | Published | CVSS | Risk | KEV | Exploit |
|---|---|---|---|---|---|
CVE-2011-3193HIGH 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 den | Jun 16, 2012 | 9.3 | 33 | NO | NO |
CVE-2025-14576HIGH Insufficient validation of node IDs in Qt SVG module allows arbitrary QML/JavaScript code injection when loading malicious SVG files through the VectorImage component in Qt Quick. | Apr 30, 2026 | 7.8 | 32 | NO | NO |
CVE-2018-19873CRITICAL An issue was discovered in Qt before 5.11.3. QBmpHandler has a buffer overflow via BMP data. | Dec 26, 2018 | 9.8 | 32 | NO | NO |
CVE-2017-10904CRITICAL Qt for Android prior to 5.9.0 allows remote attackers to execute arbitrary OS commands via unspecified vectors. | Dec 16, 2017 | 9.8 | 32 | NO | NO |
CVE-2010-2621MEDIUM 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 loo | Jul 2, 2010 | 5.0 | 32 | NO | YES |
CVE-2011-3194HIGH 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 th | Jun 16, 2012 | 9.3 | 31 | NO | NO |
CVE-2018-19870HIGH 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. | Dec 26, 2018 | 8.8 | 29 | NO | NO |
CVE-2023-51714CRITICAL An issue was discovered in the HTTP2 implementation in Qt before 5.15.17, 6.x before 6.2.11, 6.3.x through 6.5.x before 6.5.4, and 6.6.x before 6.6.2. network/access/http2/hpacktab | Dec 24, 2023 | 9.8 | 28 | NO | NO |
CVE-2018-15518HIGH QXmlStream in Qt 5.x before 5.11.3 has a double-free or corruption during parsing of a specially crafted illegal XML document. | Dec 26, 2018 | 8.8 | 28 | NO | NO |
CVE-2026-9499MEDIUM An out-of-bounds read (buffer over-read) vulnerability exists in QTextCodec::codecForName() in Qt. When the function is called with a QByteArray that is not NUL-terminated (for exa | Jul 21, 2026 | 6.3 | 27 | NO | NO |
Signals from CVEs in this vendor scope (67 CVEs).
An overview of all social media posts that mention a CVE ID that affects a product developed by Qt.
Media articles that mention a CVE ID that affects a product developed by Qt — matched by CVE ID, not by vendor name.