vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2026-105946

Out-of-bounds read vulnerability in NTLM authentication handling impacts Qt

MEDIUM
5.3
CVSS Score
Published: October 27, 2026 at 06:45 AM UTC
Updated: October 27, 2026 at 03:03 PM UTC
1 product affected across 1 vendorQt

Using qt by qt?

Get instant alerts when new vulnerabilities affect qt - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM5.3
Exploit prediction
EPSS 0.5%

Description

Out-of-bounds read in the QAuthenticator NTLM authentication handling in the Qt Network module in Qt Group Qt allows remote attackers to obtain sensitive information (heap memory contents) or cause a denial of service (application crash) via a crafted NTLM challenge sent by a malicious server or proxy, when an application using QNetworkAccessManager or QTcpSocket authenticates with NTLM.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

References (4)

Vendor Advisory
Source: cverecord
https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-105946:
Patch
Source: cverecord
https://codereview.qt-project.org/c/qt/qtbase/+/745457
Patch
Source: cverecord
https://codereview.qt-project.org/c/qt/qtbase/+/744448
Patch
Source: cverecord
https://codereview.qt-project.org/c/qt/qtbase/+/745464

CVSS

5.3MEDIUMQt
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-125

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card