CVE-2026-96432 PUBLISHED

Null pointer dereference vulnerability in QNetworkAccessManager impacts Qt

Assigner: Qt
Reserved: 23.09.2026 Published: 26.10.2026 Updated: 26.10.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/AU:N/R:U/RE:L/U:Green
CVSS Score: 2.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	Present	Availability	High	Availability	None
Privileges Required	None
User Interaction	Active

CVSS 4.0

Product Status

Vendor	qt
Product	qt
Versions	Default: unaffected affected from 6.8.0 to 6.8.9 (incl.) affected from 6.9.0 to 6.11.2 (incl.)

Credits

Daniel Birtwhistle finder

References

Problem Types

CWE-476 NULL Pointer Dereference CWE

Impacts

CAPEC-220 Client-Server Protocol Manipulation