CVE-2026-96432: Null pointer dereference vulnerability in QNetworkAccessManager impacts Qt

Severity: low (CVSS 2.1 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-26 · updated 2026-10-26
Weakness: CWE-476

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.

Affected products

Qt: from 6.8.0 through 6.8.9; from 6.9.0 through 6.11.2

References

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

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