CVE-2026-96432: Null Dereference

Description

A malicious or compromised HTTP/2 server withholding SETTINGS ACK can send RST_STREAM on a completed stream, planting a null pointer, and then send a PUSH_PROMISE for that stream, causing a null pointer dereference in the QNetworkAccessManager class of the Qt Network module that crashes the application.

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Weakness Type (CWE)

CWE-476 CWE-476

References

Other References

https://codereview.qt-project.org/c/qt/qtbase/+/759718 https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-96432:

Frequently Asked Questions

What is CVE-2026-96432? +

A malicious or compromised HTTP/2 server withholding SETTINGS ACK can send RST_STREAM on a completed stream, planting a null pointer, and then send a PUSH_PROMISE for that stream, causing a null pointer dereference in the QNetworkAccessManager class of the Qt Network module that crashes the application.

How do I check if I'm vulnerable to CVE-2026-96432? +

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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