CVE-2023-34410
MediumCVSS 5.3Exploitation Probability (EPSS)
Low risk49th percentile - higher than 49% of all known CVEs
Summary
An issue was discovered in Qt before 5.15.15, 6.x before 6.2.9, and 6.3.x through 6.5.x before 6.5.2 related to TLS certificate validation. The validation does not always consider whether the root of a chain is a configured CA certificate.
Risk Assessment
Insufficient certificate validation may lead to man-in-the-middle attacks, jeopardizing the integrity and confidentiality of data transmitted over TLS.
Recommendation
It is recommended to update Qt to version 5.15.15 or 6.2.9 and 6.5.2 to ensure proper TLS certificate validation.
Other vulnerabilities in Qt
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- CVE-2025-5455High
An issue was found in the private API function qDecodeDataUrl() in QtCore, used in QTextDocument and QNetworkReply. Calling it with malformed data, e.g., a URL with a "charset" parameter lacking a value, triggers an assertion and aborts the program (denial of service).
- CVE-2025-4211High
A symlink attack vulnerability was found in the Qt corelib module on Windows via QFileSystemEngine. The use of GetTempPath API allows manipulation of temporary file paths, potentially leading to unauthorized access and privilege escalation.
Original NVD description (English source)
An issue was discovered in Qt before 5.15.15, 6.x before 6.2.9, and 6.3.x through 6.5.x before 6.5.2. Certificate validation for TLS does not always consider whether the root of a chain is a configured CA certificate.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS