--- title: Security advisory: Potential Use-After-Free issue in Qt... description: A potential Use-After-Free issue has been discovered in Qt's wasm implementation of QNetworkReply. The issue affects Qt versions 6.5.4, 6.5.5, and 6.6.2. Users... canonical: https://daily.dev/posts/security-advisory-potential-use-after-free-issue-in-qt-for-webassembly-s-implementation-of-qnetwork-byq3bkxth twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Security advisory: Potential Use-After-Free issue in Qt for WebAssembly’s implementation of QNetworkReply | daily.dev og:description: A potential Use-After-Free issue has been discovered in Qt's wasm implementation of QNetworkReply. The issue affects Qt versions 6.5.4, 6.5.5, and 6.6.2. Users... og:url: https://daily.dev/posts/security-advisory-potential-use-after-free-issue-in-qt-for-webassembly-s-implementation-of-qnetwork-byq3bkxth og:image: https://api.daily.dev/og/posts/Byq3bkxTh.png og:image:alt: Security advisory: Potential Use-After-Free issue in Qt for WebAssembly’s implementation of QNetworkReply 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: Potential Use-After-Free issue in Qt for WebAssembly’s implementation of QNetworkReply **[Qt](https://daily.dev/sources/qt)** · 1 min read · 0 upvotes · 0 comments ## Summary A potential Use-After-Free issue has been discovered in Qt's wasm implementation of QNetworkReply. The issue affects Qt versions 6.5.4, 6.5.5, and 6.6.2. Users are advised to apply the provided patch or update to Qt 6.5.6 or 6.6.3. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 1 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments - [CNCF Unveils Schedule for KubeCon \+ CloudNativeCon Europe 2026](https://daily.dev/posts/cncf-unveils-schedule-for-kubecon-cloudnativecon-europe-2026-ikhcoa5cb) · CNCF · 2 upvotes · 0 comments - [CNCF Debuts KubeCon \+ CloudNativeCon Japan 2026 Schedule](https://daily.dev/posts/cncf-debuts-kubecon-cloudnativecon-japan-2026-schedule-xp5pyudub) · CNCF · 1 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security), [#webassembly](https://daily.dev/tags/webassembly), [#qt](https://daily.dev/tags/qt) [View this post on daily.dev](https://daily.dev/posts/security-advisory-potential-use-after-free-issue-in-qt-for-webassembly-s-implementation-of-qnetwork-byq3bkxth) ```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: Potential Use-After-Free issue in Qt for WebAssembly’s implementation of QNetworkReply","url":"https://daily.dev/posts/security-advisory-potential-use-after-free-issue-in-qt-for-webassembly-s-implementation-of-qnetwork-byq3bkxth","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/security-advisory-potential-use-after-free-issue-in-qt-for-webassembly-s-implementation-of-qnetwork-byq3bkxth"},"datePublished":"2024-04-18T09:08:17.062Z","dateModified":"2024-05-09T08:39:06.345Z","description":"A potential Use-After-Free issue has been discovered in Qt's wasm implementation of QNetworkReply. 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