Out-of-bounds Read in Qt

CVE-2026-105946

Out-of-bounds read in the QAuthenticator NTLM authentication handling in the Qt Network module in Qt Group Qt allows remote attackers to obtain sensitive information (heap memory contents) or cause a denial of service (application crash) via a crafted NTLM challenge sent by a malicious server or proxy, when an application using QNetworkAccessManager or QTcpSocket authenticates with NTLM.

Vulnerability class: Buffer Overflow

Published · last modified .

EPSS exploit prediction

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Affected products

Weakness classification (CWE)

References