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  4. CVE 2026 105946 out of bounds read vulnerability in ntlm
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Back to active CVEs
Medium · CVSS 5.3CVE-2026-105946

Out-of-bounds read vulnerability in NTLM authentication handling impacts QtCVE-2026-105946

Answer in brief

CVE-2026-105946 records a Medium severity (CVSS 5.3) vulnerability in Out-of-bounds read vulnerability in NTLM authentication handling impacts Qt. The current sources do not mark it as known exploited. The current feed maps qt/qt (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 27, 2026Updated Oct 27, 2026Source checked Oct 27, 2026First seen by HOL Oct 27, 2026Material review Oct 27, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.3
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps qt/qt (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
qt/qtgeneric>=6.8.0 <6.8.10 || >=6.9.0 <6.11.26.8.10, 6.11.2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for qt/qt.
  2. 2Review the reported fix. Update qt/qt to 6.8.10 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 27, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 27, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 27, 2026

Sources and claim methodology

  • Source referencecodereview.qt-project.org
  • Source referencecodereview.qt-project.org
  • Source referencecodereview.qt-project.org
  • Source referencewiki.qt.io
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Out-of-bounds read vulnerability in QTextCodec TSCII encoding impacts QtSame qt/qt package
  • llama.cpp before b2731 Out-of-Bounds Read via GGUF Tensor OffsetsAlso CWE-125
  • llama.cpp before b5649 Heap Out-of-Bounds Read via llama_vocab::impl::print_infoAlso CWE-125
  • Tencent RapidJSON Regex stream.h Take out-of-boundsAlso CWE-125
  • DevilutionX 1.4.0 through 1.5.5 Out-of-Bounds Read via libmpq Hash Table LookupAlso CWE-125

Record context

Vulnerability class
Buffer Overflow
EPSS
Not reported
CWE IDs
CWE-125
Source
CVE List V5
Source checked
Oct 27, 2026
References
4 linked sources
Open source record