CVE-2026-95620

Use-after-free vulnerability in QNetworkAccessManager HTTP/2 support impacts Qt

State: Published
Severity: 2.1 Low
Published: Oct 23, 2026
Updated: Oct 23, 2026
Reserved: Sep 22, 2026

Description

A use-after-free vulnerability in the Qt QNetworkAccessManager HTTP/2 client support of the Qt Network module allows a malicious or compromised HTTP/2 server to cause the client application to crash, affecting availability.

Scores

CVSS	Score	Vector	Source
4.0	2.1 Low	CVSS:4.0/AV:N/AC:H/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	Qt

Weaknesses

CWE-416 Use After Free

Affected Products

Product	Versions
qtqt	before 6.9.0Unknown 6.9.0 to before 6.11.3Affected

References

https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-95620:vendor-advisory
https://codereview.qt-project.org/c/qt/qtbase/+/759717patch

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