--- title: Action Required: Potential Disruption of KurrentDB... description: Public Certificate Authorities are removing the clientAuth Extended Key Usage (EKU) from TLS server certificates, following Google Chrome Root Program policy... canonical: https://daily.dev/posts/action-required-potential-disruption-of-kurrentdb-service-due-to-public-ca-certificate-clientauth-e-jzapqod4d twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Action Required: Potential Disruption of KurrentDB Service due to Public CA Certificate clientAuth EKU Removal | daily.dev og:description: Public Certificate Authorities are removing the clientAuth Extended Key Usage (EKU) from TLS server certificates, following Google Chrome Root Program policy... og:url: https://daily.dev/posts/action-required-potential-disruption-of-kurrentdb-service-due-to-public-ca-certificate-clientauth-e-jzapqod4d og:image: https://api.daily.dev/og/posts/Jzapqod4D.png og:image:alt: Action Required: Potential Disruption of KurrentDB Service due to Public CA Certificate clientAuth EKU Removal 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. # Action Required: Potential Disruption of KurrentDB Service due to Public CA Certificate clientAuth EKU Removal **[Event Store](https://daily.dev/sources/eventstore)** · 6 min read · 0 upvotes · 0 comments ## Summary Public Certificate Authorities are removing the clientAuth Extended Key Usage (EKU) from TLS server certificates, following Google Chrome Root Program policy v1.8. This affects KurrentDB multi-node clusters running version 24.2 or later that use public CA certificates, as nodes require both serverAuth and clientAuth EKUs for inter-node authentication. Affected nodes will fail to join clusters with the error 'Missing extended key usage: Client Authentication'. The fix is to upgrade to KurrentDB 24.10.12 or 26.0.2, which introduces a DisableClientAuthEkuValidation configuration option. Kurrent Cloud users must act before August 3, 2026; self-managed users should act before their next certificate renewal. A future dual-certificate model is planned to eliminate the workaround entirely. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [The Public CA clientAuth EKU Sunset: What Apache Software Deployers Need to Know](https://daily.dev/posts/the-public-ca-clientauth-eku-sunset-what-apache-software-deployers-need-to-know-nr5vrbigq) · The Apache Software Foundation Blog · 0 upvotes · 0 comments - [Changes to TLS clientAuth Certificates: Ensuring You’re Not Impacted](https://daily.dev/posts/changes-to-tls-clientauth-certificates-ensuring-you-re-not-impacted-ebetmr0aj) · Cisco · 0 upvotes · 0 comments - [Web PKI Ditches TLS Client Authentication](https://daily.dev/posts/web-pki-ditches-tls-client-authentication-o830n7oou) · Feisty Duck · 0 upvotes · 0 comments - [Quick preview of KurrentDB v26.2](https://daily.dev/posts/quick-preview-of-kurrentdb-v26-2-il7mfj5qb) · Event Store · 1 upvotes · 0 comments - [Licensing in KurrentDB v26.2 and beyond: what's free and what's licensed](https://daily.dev/posts/licensing-in-kurrentdb-v26-2-and-beyond-what-s-free-and-what-s-licensed-s0vcosgag) · Event Store · 0 upvotes · 0 comments --- [View this post on daily.dev](https://daily.dev/posts/action-required-potential-disruption-of-kurrentdb-service-due-to-public-ca-certificate-clientauth-e-jzapqod4d) ```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":"Action Required: Potential Disruption of KurrentDB Service due to Public CA Certificate clientAuth EKU Removal","url":"https://daily.dev/posts/action-required-potential-disruption-of-kurrentdb-service-due-to-public-ca-certificate-clientauth-e-jzapqod4d","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/action-required-potential-disruption-of-kurrentdb-service-due-to-public-ca-certificate-clientauth-e-jzapqod4d"},"datePublished":"2026-08-04T14:30:29.759Z","dateModified":"2026-08-24T06:56:44.256Z","description":"Public Certificate Authorities are removing the clientAuth Extended Key Usage (EKU) from TLS server certificates, following Google Chrome Root Program policy...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/1d48354839c99237dc85e9b32b840340?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/1d48354839c99237dc85e9b32b840340?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Event Store","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":"Event Store","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/6e7940e0a29e4b3cbfef11831ec252c2","url":"https://daily.dev/sources/eventstore"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/action-required-potential-disruption-of-kurrentdb-service-due-to-public-ca-certificate-clientauth-e-jzapqod4d","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"","timeRequired":"PT6M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Event Store","item":"https://daily.dev/sources/eventstore"},{"@type":"ListItem","position":3,"name":"Action Required: Potential Disruption of KurrentDB Service due to Public CA Certificate clientAuth EKU Removal"}]} ```