{"id":4506,"date":"2026-02-19T11:07:46","date_gmt":"2026-02-19T11:07:46","guid":{"rendered":"https:\/\/certera.com\/blog\/?p=4506"},"modified":"2026-02-23T05:12:23","modified_gmt":"2026-02-23T05:12:23","slug":"major-ssl-tls-certificate-changes-2026-every-website-owner-must-know","status":"publish","type":"post","link":"https:\/\/certera.com\/blog\/major-ssl-tls-certificate-changes-2026-every-website-owner-must-know\/","title":{"rendered":"Major SSL\/TLS Certificate Changes 2026: Every Website Owner Must Know"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Website owners should take notice of the future changes to the SSL\/TLS industry that affect security, certificate management, and user trust.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In 2026, Certificate Authorities (CAs), such as DigiCert and Sectigo, will be implementing many significant updates that comply with the CA\/B Forum requirements.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The following are the five significant SSL\/TLS changes effective in 2026 with a brief overview, timelines, and action steps.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-change-1-public-tls-certificates-will-change-to-199-day-validity\">Change 1 &#8211; Public TLS Certificates Will Change To 199 Day Validity<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Public SSL\/TLS Certificates will no longer be issued for one year; they will <a href=\"https:\/\/certera.com\/blog\/ca-b-approved-47-day-ssl-tls-validity-by-2029-how-to-prepare\/\">now be valid for 199 days<\/a> with shorter renewal periods.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-changes-for-digicert-timeline\">Changes for DigiCert (Timeline)<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Maximum Certificate Validity<\/strong><\/td><td><strong>Due Date<\/strong><\/td><\/tr><tr><td>397 days<\/td><td>Before February 24, 2026<\/td><\/tr><tr><td>199 days<\/td><td>Between February 24, 2026 \u2013 Early 2027<\/td><\/tr><tr><td>99 days<\/td><td>Between Early 2027 \u2013 Early 2029<\/td><\/tr><tr><td>46 days<\/td><td>After Early 2029<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-changes-for-sectigo-timeline\">Changes for Sectigo (Timeline)<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Maximum Certificate Validity<\/strong><\/td><td><strong>Due Date<\/strong><\/td><\/tr><tr><td>398 days<\/td><td>Before March 15, 2026<\/td><\/tr><tr><td>200 days<\/td><td>Between March 15, 2026 \u2013 March 15, 2027<\/td><\/tr><tr><td>100 days<\/td><td>Between March 15, 2027 \u2013 March 15, 2029<\/td><\/tr><tr><td>47 days<\/td><td>After March 15, 2029<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-required-actions-to-take\">Required Actions to Take<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Discover all certificates<\/li>\n\n\n\n<li>Inventory all certificate-dependent systems<\/li>\n\n\n\n<li>Map <a href=\"https:\/\/certera.com\/blog\/what-is-pki-automation-benefits-and-role-of-certificate-lifecycle-automation\/\">automation opportunities<\/a><\/li>\n\n\n\n<li>Build a rollout plan<\/li>\n\n\n\n<li>Embrace automation<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Also Read:<\/strong> <a href=\"https:\/\/certera.com\/blog\/47-day-ssl-tls-mandates-a-step-towards-transitioning-to-automation\/\">How to Prepare for a 47-Day SSL\/TLS Shortened Lifespan?<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-change-2-domain-validation-dcv-reuse-reduction\">Change 2: Domain Validation (DCV) Reuse Reduction<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">By not allowing DCV to be reused for a longer period of time, the verification process will occur more frequently.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-changes-for-digicert-timeline-0\">Changes for DigiCert (Timeline)<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Maximum Domain Validation Reuse Period<\/strong><\/td><td><strong>Timeline<\/strong><\/td><\/tr><tr><td>397 days<\/td><td>Before February 24, 2026<\/td><\/tr><tr><td>199 days<\/td><td>Between February 24, 2026 \u2013 Early 2027<\/td><\/tr><tr><td>99 days<\/td><td>Between Early 2027 \u2013 Early 2029<\/td><\/tr><tr><td>9 days<\/td><td>After Early 2029<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-changes-for-sectigo-timeline-0\">Changes for Sectigo (Timeline)<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Maximum Domain Validation Reuse Period<\/strong><\/td><td><strong>Due Date<\/strong><\/td><\/tr><tr><td>398 days<\/td><td>Before March 15, 2026<\/td><\/tr><tr><td>200 days<\/td><td>Between March 15, 2026 \u2013 March 15, 2027<\/td><\/tr><tr><td>100 days<\/td><td>Between March 15, 2027 \u2013 March 15, 2029<\/td><\/tr><tr><td>10 days<\/td><td>After March 15, 2029<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-required-actions-to-take-0\">Required Actions to Take<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Prepare for DCV to be checked more recently\/more frequently<\/li>\n\n\n\n<li>DNS-based validation should be used to provide more reliable methods<\/li>\n\n\n\n<li>Automate as much as you can with DCV<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Also Read:<\/strong> <a href=\"https:\/\/certera.com\/blog\/digicert-elevates-industry-standards-with-new-open-source-dcv-library\/\">DigiCert Elevates Industry Standards with New Open-Source DCV Library<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-change-3-using-mpic-for-domain-control-amp-caa-checks\">Change 3: Using MPIC for Domain Control &amp; CAA Checks<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/certera.com\/blog\/multi-perspective-issuance-corroboration-strengthening-certificate-validation-security\/\">Multi-Perspective Issuance Corroboration (MPIC)<\/a> to verify that domain control and CAA checks are accurate across multiple networks.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>CA\/Browser Forum Timeline<\/strong><\/td><td><strong>Number of Distinct Remote Network Perspectives Used<\/strong><\/td><td><strong>Number of Allowed Non-corroborations<\/strong><\/td><\/tr><tr><td>Phase One \u2014 Effective March 2025<\/td><td>Check from multiple network locations only<\/td><td>Not applicable<\/td><\/tr><tr><td>Phase Two \u2014 Effective September 2025<\/td><td>Check from at least 2 remote network locations<\/td><td>One non-corroboration allowed\u00b9<\/td><\/tr><tr><td>Phase Three \u2014 Effective February 2026<\/td><td>Check from at least 3 remote network locations and at least 2 different Regional Internet Registries (RIRs)<\/td><td>One non-corroboration allowed\u00b9<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-required-actions-to-take-1\">Required Actions to Take<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ensure that the domain DNS and HTTP validation paths are accessible on public networks<\/li>\n\n\n\n<li>Prevent firewall and\/or geo-blocking problems<\/li>\n\n\n\n<li>Closely monitor any validation failures<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-change-4-dnssec-enforcement\">Change 4: DNSSEC Enforcement<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">DNSSEC has an enhanced role in verifying domain ownership as well as validating the security of issuing certificates.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DNSSEC has an enhanced role in verifying domain ownership as well as validating the security of issuing certificates.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Date<\/strong><\/td><td><strong>Event \/ Update<\/strong><\/td><td><strong>Notes<\/strong><\/td><\/tr><tr><td>February 24, 2026<\/td><td>DigiCert begins enforcing DNSSEC validation<\/td><td>DNSSEC validation applied during DCV + CAA checks when DNSSEC is present.<\/td><\/tr><tr><td>March 12, 2026<\/td><td>Sectigo operational date<\/td><td>Sectigo compliance hub highlights broader 2026 compliance changes, including DCV reuse shortening and reminders for DNSSEC signing configuration.<\/td><\/tr><tr><td>March 15, 2026<\/td><td>CA\/Browser Forum Baseline Requirements update<\/td><td>DNSSEC validation becomes mandatory for relevant DNS lookups (industry-wide effective date in BR text).<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-required-actions-to-take-2\">Required Actions to Take<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Review DNS configurations<\/li>\n\n\n\n<li>Ensure DNSSEC is properly implemented (if enabled)<\/li>\n\n\n\n<li>Fix misconfigured or broken DNSSEC records<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-change-5-sunsetting-client-authentication-eku-from-public-tls-certificates\">Change 5: Sunsetting Client Authentication EKU from Public TLS Certificates<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Public TLS certificates will <a href=\"https:\/\/certera.com\/blog\/sectigo-and-digicert-to-remove-client-authentication-eku-from-public-ssl-tls-certificates\/\">no longer support Client Authentication Extended Key Usage (EKU)<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Change<\/strong><\/td><td><strong>Chrome Policy<\/strong><\/td><td><strong>DigiCert Transition Plan<\/strong><\/td><\/tr><tr><td>Extended Key Usage (EKU)<\/td><td>Prior to June 15, 2026 \u2014 Both Server and Client Authentication EKUs can be included in TLS certificates<\/td><td>October 1, 2025 \u2014 Start issuing public TLS certificates with only Server Authentication EKU by default.Temporarily allow option to include both Server and Client Authentication EKUs during enrollment<\/td><\/tr><tr><td><\/td><td>Starting June 15, 2026 \u2014 Only Server Authentication EKU can be included in TLS certificates<\/td><td>May 1, 2026 \u2014 Fully remove Client Authentication EKU from newly issued public TLS certificates (new, renewals, reissues, duplicates)<\/td><\/tr><tr><td>PKI Hierarchy<\/td><td>Prior to June 15, 2026 \u2014 TLS certificates may be issued from multipurpose root hierarchies<\/td><td rowspan=\"2\">DigiCert will convert these roots to dedicated TLS hierarchies:<br>\u2022 DigiCert Global Root G2\u2022 DigiCert Global Root G3\u2022 DigiCert TLS ECC P384 Root G5\u2022 DigiCert TLS RSA4096 Root G5\u2022 QuoVadis Root CA2 G3<\/td><\/tr><tr><td><\/td><td>Starting June 15, 2026 \u2014 TLS certificates must be issued from dedicated TLS root hierarchies<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-required-actions-to-take-3\">Required Actions to Take<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Stop using public TLS certificates to authenticate clients<\/li>\n\n\n\n<li>Switch to either using a <a href=\"https:\/\/certera.com\/solutions\/private-ca\">private PKI<\/a> or dedicated client-authentication certificates<\/li>\n\n\n\n<li>Audit all applications that use <a href=\"https:\/\/certera.com\/blog\/what-is-mtls-authentication-mutual-tls\/\">Mutual TLS (mTLS)<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-future-changes-to-keep-in-mind\">Future Changes to Keep in Mind<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Date<\/strong><\/td><td><strong>Update<\/strong><\/td><\/tr><tr><td><strong>March 15, 2026<\/strong><\/td><td><strong>The Crossover method (3.2.2.4.8 ) will be phased out entirely<\/strong>. Phone\/email methods are officially discouraged, but still allowed.<\/td><\/tr><tr><td><strong>March 15, 2027<\/strong><\/td><td><strong>Phone verification methods will be completely phased out<\/strong>, and no new certificates will be issued using this form of verification.<\/td><\/tr><tr><td><strong>March 15, 2028<\/strong><\/td><td><strong>Email verification methods will be completely phased out<\/strong>, and all certificates will use DNS, HTTP or IP verification forms.&nbsp;<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-conclusion\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The SSL\/TLS ecosystem continues to change in order to create better security, trust, &amp; automation. By keeping current with these developments, you will eliminate the risk of certificate failures and downtimes as well as regulatory compliance issues.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Keep your current by monitoring the industry and <strong>visiting our blog for information<\/strong> on any updates to the CA\/B forum, as well as the latest changes by DigiCert &amp; Sectigo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Our site has numerous options to <a href=\"https:\/\/certera.com\/buy-ssl-certificates\">purchase SSL certificates<\/a>, and feel free to reach out to our support staff for assistance with anything.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Website owners should take notice of the future changes to the SSL\/TLS industry that affect security, certificate management, and user trust. In 2026, Certificate Authorities (CAs), such as DigiCert and Sectigo, will be implementing many significant updates that comply with the CA\/B Forum requirements. The following are the five significant SSL\/TLS changes effective in 2026<span class=\"morelink d-block mt-3\"><a href=\"https:\/\/certera.com\/blog\/major-ssl-tls-certificate-changes-2026-every-website-owner-must-know\/\">Read More<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":4509,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[719,5],"tags":[862,861,860],"class_list":["post-4506","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pki","category-ssl-certificate","tag-future-of-https","tag-ssl-tls-changes-2026","tag-ssl-tls-key-updates","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>2026 SSL\/TLS Evolution: Five Major Changes Reshaping Web Security<\/title>\n<meta name=\"description\" content=\"From Deprecations to Post-Quantum to Shorten Lifespans: 5 Critical SSL\/TLS Changes Coming in 2026 That Every Organization Must Prepare For.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/certera.com\/blog\/major-ssl-tls-certificate-changes-2026-every-website-owner-must-know\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"2026 SSL\/TLS Evolution: Five Major Changes Reshaping Web Security\" \/>\n<meta property=\"og:description\" content=\"From Deprecations to Post-Quantum to Shorten Lifespans: 5 Critical SSL\/TLS Changes Coming in 2026 That Every Organization Must Prepare For.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/certera.com\/blog\/major-ssl-tls-certificate-changes-2026-every-website-owner-must-know\/\" \/>\n<meta property=\"og:site_name\" content=\"EncryptedFence by Certera - Web &amp; Cyber 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