Vulnerability Description
An issue was found in the private API function qDecodeDataUrl() in QtCore, which is used in QTextDocument and QNetworkReply, and, potentially, in user code. If the function was called with malformed data, for example, an URL that contained a "charset" parameter that lacked a value (such as "data:charset,"), and Qt was built with assertions enabled, then it would hit an assertion, resulting in a denial of service (abort). This impacts Qt up to 5.15.18, 6.0.0->6.5.8, 6.6.0->6.8.3 and 6.9.0. This has been fixed in 5.15.19, 6.5.9, 6.8.4 and 6.9.1.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2025-5455?
CVE-2025-5455 is a documented vulnerability. An issue was found in the private API function qDecodeDataUrl() in QtCore, which is used in QTextDocument and QNetworkReply, and, potentially, in user code. If the function was called with malformed ...
How severe is CVE-2025-5455?
CVSS scoring is not yet available for CVE-2025-5455. Check NVD for updates.
Is there a patch for CVE-2025-5455?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.