CVE-2026-107590: Memory Corruption

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.

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Weakness Type (CWE)

CWE-131 CWE-131

CWE-787 Out-of-bounds Write

References

Other References

https://codereview.qt-project.org/c/qt/qt5compat/+/762752 https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-107590:

Frequently Asked Questions

What is CVE-2026-107590? +

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.

How do I check if I'm vulnerable to CVE-2026-107590? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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