All vulnerabilities
CVE-2026-95620

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

qt qt
Open in ThreatlineRecord JSON
CVSS
2.1Low
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)No scoreNo FIRST EPSS score in this snapshot yet
Fixed in6.11.3Fixed versionCVE List
Published23 Oct 2026Updated 23 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 2

  • qtunknown: all versions before 6.9.0CVE List
  • qtaffected: 6.9.0 before 6.11.3CVE List

References 2