Low severity · published Oct 27, 2026
CVE-2026-107590
Out-of-bounds write vulnerability in QTextCodec iconv-based encoding impacts Qt
New
1.9
CVSS
–
EPSS
No
On KEV
Description
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.
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
QT
Qt · qt
4.5.0 through 6.8.8; 6.9.0 through 6.11.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-107590
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-107590
codereview.qt-project.org
https://codereview.qt-project.org/c/qt/qt5compat/+/762752
wiki.qt.io
https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-107590:
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