--- title: Security advisory: CVE-2026-105946 Out-of-bounds read... description: Qt has an out-of-bounds read vulnerability tracked as CVE-2026-105946 in its NTLM authentication handling. The flaw may leak heap memory. Update to Qt 6.11.2,... canonical: https://daily.dev/posts/security-advisory-cve-2026-105946-out-of-bounds-read-vulnerability-in-ntlm-authentication-handling--fakikzvwv twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Security advisory: CVE-2026-105946 Out-of-bounds read vulnerability in NTLM authentication handling impacts Qt | daily.dev og:description: Qt has an out-of-bounds read vulnerability tracked as CVE-2026-105946 in its NTLM authentication handling. The flaw may leak heap memory. Update to Qt 6.11.2,... og:url: https://daily.dev/posts/security-advisory-cve-2026-105946-out-of-bounds-read-vulnerability-in-ntlm-authentication-handling--fakikzvwv og:image: https://api.daily.dev/og/posts/faKIKzVWv.png og:image:alt: Security advisory: CVE-2026-105946 Out-of-bounds read vulnerability in NTLM authentication handling impacts Qt og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Security advisory: CVE-2026-105946 Out-of-bounds read vulnerability in NTLM authentication handling impacts Qt **[Qt](https://daily.dev/sources/qt)** · 1 min read · 1 upvotes · 0 comments ## Summary Qt has an out-of-bounds read vulnerability tracked as CVE-2026-105946 in its NTLM authentication handling. The flaw may leak heap memory. Update to Qt 6.11.2, 6.8.10, or 6.12.0. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What is CVE-2026-105946 and does it affect my Qt application? CVE-2026-105946 is an out-of-bounds read vulnerability in Qt's NTLM authentication handling that may leak heap memory. It affects applications using Qt's NTLM authentication code. The fix is included in Qt 6.11.2, 6.8.10, and 6.12.0, so applications should be updated to one of these versions. _Teams patching Qt security issues track advisories like this one on daily.dev._ ## Similar posts on daily.dev - [Security advisory: CVE-2026-107472 Out-of-bounds read vulnerability in QTextCodec TSCII encoding impacts Qt An out-of-bounds read vulnerability in the Qt](https://daily.dev/posts/security-advisory-cve-2026-107472-out-of-bounds-read-vulnerability-in-qtextcodec-tscii-encoding-imp-ahfx9rght) · Qt · 0 upvotes · 0 comments - [Security advisory: CVE-2026-101201 Out-of-bounds read vulnerability in JSON document parsing functionality impacts Qt Core and Qt 5 Core Compatibility APIs](https://daily.dev/posts/security-advisory-cve-2026-101201-out-of-bounds-read-vulnerability-in-json-document-parsing-functio-8qpkvlkym) · Qt · 0 upvotes · 0 comments - [Security advisory: CVE-2026-107590: Out-of-bounds write vulnerability in QTextCodec iconv-based encoding impacts Qt](https://daily.dev/posts/security-advisory-cve-2026-107590-out-of-bounds-write-vulnerability-in-qtextcodec-iconv-based-enco-gj5jrwyu9) · Qt · 1 upvotes · 0 comments - [Security advisory: CVE-2026-107157 Out-of-bounds read vulnerability in QCborValue::fromCbor\(\) impacts Qt Framework](https://daily.dev/posts/security-advisory-cve-2026-107157-out-of-bounds-read-vulnerability-in-qcborvalue-fromcbor-impact-sehtor5ev) · Qt · 0 upvotes · 0 comments - [Security advisory: CVE-2026-96432 - Null pointer dereference vulnerability in QNetworkAccessManager impacts Qt](https://daily.dev/posts/security-advisory-cve-2026-96432---null-pointer-dereference-vulnerability-in-qnetworkaccessmanager--zmilvwptr) · Qt · 0 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security), [#qt](https://daily.dev/tags/qt) [View this post on daily.dev](https://daily.dev/posts/security-advisory-cve-2026-105946-out-of-bounds-read-vulnerability-in-ntlm-authentication-handling--fakikzvwv) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Security advisory: CVE-2026-105946 Out-of-bounds read vulnerability in NTLM authentication handling impacts Qt","url":"https://daily.dev/posts/security-advisory-cve-2026-105946-out-of-bounds-read-vulnerability-in-ntlm-authentication-handling--fakikzvwv","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/security-advisory-cve-2026-105946-out-of-bounds-read-vulnerability-in-ntlm-authentication-handling--fakikzvwv"},"datePublished":"2026-10-27T06:07:57.283Z","dateModified":"2026-10-27T06:08:24.252Z","description":"Qt has an out-of-bounds read vulnerability tracked as CVE-2026-105946 in its NTLM authentication handling. 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