Information disclosure vulnerability in authentication handling of QWebSocket impacts Qt Framework

published 2026-11-06 3 d ago modified 2026-11-06 2 d ago also EUVD-2026-117889

cvss: 2.3; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits: 0; none known

An information disclosure vulnerability in the Qt Framework QWebSocket authentication handling of the Qt WebSockets module.

Patch / fix

fixed in 1 links 1

qt Qt Framework 6.8.10, 6.11.3, 6.12.1

codereview.qt-project.org/c/qt/qtwebsockets/+/772273 patch

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-114366 updated 2026-11-07 cvss 3.7

qt6-qtwebsockets: Information disclosure vulnerability in authentication handling of QWebSocket impacts Qt Framework

Red Hat Enterprise Linux 10 qt6-qtwebsockets Red Hat Hardened Images qt6 6.12.0-1.hum1, qt5 5.15.18-3.1.hum1
affected: workaround, no fix available “Disable unauthenticated WebSocket endpoints or restrict network access to trusted clients via reverse proxy authentication controls until an update can be applied.”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	2.3	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
CNA	4.0	2.3	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

Affected products

qt Qt Framework

Classification

Weakness

CWE-226 Sensitive Information in Resource Not Removed Before Reuse

References

codereview.qt-project.org /c/qt/qtwebsockets/+/772273
patch
wiki.qt.io /List_of_known_vulnerabilities_in_Qt_products#CVE-2026-114366
vendor-advisory

Sources

CVE List CVE-2026-114366
NVD CVE-2026-114366

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary