# CVE-2026-114366: Information disclosure vulnerability in authentication handling of QWebSocket impacts Qt Framework

Status: published. Published: 2026-11-06. Updated: 2026-11-06.

An information disclosure vulnerability in the Qt Framework QWebSocket authentication handling 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/+/772273

## Affected products and versions

- qt / Qt Framework: ≥ 0; < 6.6.0 (unknown, python); ≥ 6.6.0; < 6.8.10 (affected, python); ≥ 6.9.0; < 6.11.3 (affected, python); ≥ 6.12.0; < 6.12.1 (affected, python). Source: CNA: Qt

## Severity and prioritization

- CVSS 4.0: 2.3 (low); CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/AU:N/RE:L/U:Green; source: CNA: Qt

- CVSS 4.0: 2.3 (low); CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:X/V:X/RE:L/U:Green; source: NVD: a59d8014-47c4-4630-ab43-e1b13cbe58e3

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-226

## Exploit evidence

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

## References

- https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-114366 (CNA: Qt; vendor-advisory)

- https://codereview.qt-project.org/c/qt/qtwebsockets/+/772273 (CNA: Qt; patch)

- https://codereview.qt-project.org/c/qt/qtwebsockets/+/772273 (a59d8014-47c4-4630-ab43-e1b13cbe58e3)

- https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-114366 (a59d8014-47c4-4630-ab43-e1b13cbe58e3)

## Provenance

- CNA: Qt: https://www.cve.org/CVERecord?id=CVE-2026-114366; retrieved 2026-11-06; source updated 2026-11-06

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-114366; retrieved 2026-11-06; source updated 2026-11-06

Revision: fb53cd62deaa3175911f83fc426b9275d40a0860940fd652c09bb6c822be946f

Canonical: https://y2.dev/cve/CVE-2026-114366

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