--- title: SSL certificate chain and how its verification works in... description: This post explains how SSL certificate verification works and the role of Certificate Authorities in establishing trust. It explores the concept of certificate... canonical: https://daily.dev/posts/ssl-certificate-chain-and-how-its-verification-works-in-the-browser-when-misconfigured-in-the-serve-dwbes5k9e twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: SSL certificate chain and how its verification works in the browser (when misconfigured in the server) but not with language libraries (Python or Node)? | daily.dev og:description: This post explains how SSL certificate verification works and the role of Certificate Authorities in establishing trust. It explores the concept of certificate... og:url: https://daily.dev/posts/ssl-certificate-chain-and-how-its-verification-works-in-the-browser-when-misconfigured-in-the-serve-dwbes5k9e og:image: https://api.daily.dev/og/posts/Dwbes5K9E.png og:image:alt: SSL certificate chain and how its verification works in the browser (when misconfigured in the server) but not with language libraries (Python or Node)? 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. # SSL certificate chain and how its verification works in the browser (when misconfigured in the server) but not with language libraries (Python or Node)? **[System Weakness](https://daily.dev/sources/systemweakness)** · 7 min read · 3 upvotes · 0 comments ## Summary This post explains how SSL certificate verification works and the role of Certificate Authorities in establishing trust. It explores the concept of certificate chains and how they are validated. The post also discusses the use of AIA (Authority Information Access) in SSL certificate verification for browsers and why language libraries like Python or Node.js do not handle AIA. Finally, it provides a solution for fixing certificate chain misconfigurations in a server. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- [View this post on daily.dev](https://daily.dev/posts/ssl-certificate-chain-and-how-its-verification-works-in-the-browser-when-misconfigured-in-the-serve-dwbes5k9e) ```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":"SSL certificate chain and how its verification works in the browser (when misconfigured in the server) but not with language libraries (Python or Node)?","url":"https://daily.dev/posts/ssl-certificate-chain-and-how-its-verification-works-in-the-browser-when-misconfigured-in-the-serve-dwbes5k9e","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/ssl-certificate-chain-and-how-its-verification-works-in-the-browser-when-misconfigured-in-the-serve-dwbes5k9e"},"datePublished":"2024-04-15T13:20:03.823Z","dateModified":"2024-05-09T08:10:38.099Z","description":"This post explains how SSL certificate verification works and the role of Certificate Authorities in establishing trust. 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