# CVE-2026-114369: Security Issue CVE-2026-114369 - Resource exhaustion (denial of service) vulnerability in the WebSocket handshake handling of QWebSocket and QWebSocketServer impacts Qt Framework

Status: published. Published: 2026-11-12. Updated: 2026-11-12.

Resource exhaustion vulnerability in the Qt Framework QWebSocket and QWebSocketServer classes of the Qt WebSockets module

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: Qt) — https://codereview.qt-project.org/c/qt/qtwebsockets/+/772146
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: Qt) — https://codereview.qt-project.org/c/qt/qtwebsockets/+/772145
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: Qt) — https://codereview.qt-project.org/c/qt/qtwebsockets/+/772144

## Affected products and versions

- qt / Qt Framework: ≥ 0; < 5.15.0 (unknown, python); ≥ 5.15.0; ≤ 6.8.9 (affected, python); ≥ 6.9.0; ≤ 6.12.0 (affected, python). Source: CNA: Qt

## Severity and prioritization

- CVSS 4.0: 2.7 (low); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/R:A/RE:L/U:Clear; source: CNA: Qt

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-407

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.qt.io/security-advisories?search=CVE-2026-114369 (CNA: Qt; vendor-advisory)

- https://codereview.qt-project.org/c/qt/qtwebsockets/+/772146 (CNA: Qt; patch)

- https://codereview.qt-project.org/c/qt/qtwebsockets/+/772145 (CNA: Qt; patch)

- https://codereview.qt-project.org/c/qt/qtwebsockets/+/772144 (CNA: Qt; patch)

## Provenance

- CNA: Qt: https://www.cve.org/CVERecord?id=CVE-2026-114369; retrieved 2026-11-12; source updated 2026-11-12

Revision: 9206ee1cdf7a52327c3cb09a3f9306610efa7c85ce6b8b0cd6663546ba5d2977

Canonical: https://y2.dev/cve/CVE-2026-114369

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