--- title: CodeQL zero to hero part 3: Security research with CodeQL description: This post explores how to write and query for specific library methods using CodeQL, the difference between data flow analysis and taint flow analysis, and how... canonical: https://daily.dev/posts/codeql-zero-to-hero-part-3-security-research-with-codeql-raqjje62o twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: CodeQL zero to hero part 3: Security research with CodeQL | daily.dev og:description: This post explores how to write and query for specific library methods using CodeQL, the difference between data flow analysis and taint flow analysis, and how... og:url: https://daily.dev/posts/codeql-zero-to-hero-part-3-security-research-with-codeql-raqjje62o og:image: https://api.daily.dev/og/posts/raqjJE62o.png og:image:alt: CodeQL zero to hero part 3: Security research with CodeQL 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. # CodeQL zero to hero part 3: Security research with CodeQL **[GitHub Blog](https://daily.dev/sources/ghblog)** · 27 min read · 0 upvotes · 0 comments ## Summary This post explores how to write and query for specific library methods using CodeQL, the difference between data flow analysis and taint flow analysis, and how CodeQL can help with security research in codebases. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#security](https://daily.dev/tags/security), [#codeql](https://daily.dev/tags/codeql) [View this post on daily.dev](https://daily.dev/posts/codeql-zero-to-hero-part-3-security-research-with-codeql-raqjje62o) ```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":"CodeQL zero to hero part 3: Security research with CodeQL","url":"https://daily.dev/posts/codeql-zero-to-hero-part-3-security-research-with-codeql-raqjje62o","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/codeql-zero-to-hero-part-3-security-research-with-codeql-raqjje62o"},"datePublished":"2024-04-29T08:02:30.632Z","dateModified":"2024-05-09T08:43:33.910Z","description":"This post explores how to write and query for specific library methods using CodeQL, the difference between data flow analysis and taint flow analysis, and how...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/972b70e1d288461e49edf66ee5361dd2?_a=AQAEuiZ","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/972b70e1d288461e49edf66ee5361dd2?_a=AQAEuiZ","isAccessibleForFree":true,"articleSection":"GitHub Blog","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"GitHub Blog","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/106cf162b88840808484d4b5429b59b1","url":"https://daily.dev/sources/ghblog"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/codeql-zero-to-hero-part-3-security-research-with-codeql-raqjje62o","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"security,codeql","timeRequired":"PT27M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"GitHub Blog","item":"https://daily.dev/sources/ghblog"},{"@type":"ListItem","position":3,"name":"CodeQL zero to hero part 3: Security research with CodeQL"}]} ```