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Scalable Stories · September 14 · 9 min

OpenSSL 4.0 for NGINX: Why We Ship 3.5 LTS Instead

Technical Briefing: OpenSSL 3.5 LTS vs. 4.0 for NGINX Packaging Problem Statement The decision between OpenSSL 3.5 and 4.0 for an NGINX fleet is a question of support windows and migration cost, not feature parity. OpenSSL 4.0 shipped in April 2026 but is explicitly not an LTS release. Under the project's policy, non-LTS branches receive only 13 months of support. OpenSSL 3.5 is the current LTS, supported until April 2030. Moving an NGINX fleet from 3.5 to 4.0 today would cut the support window…

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Technical Briefing: OpenSSL 3.5 LTS vs. 4.0 for NGINX Packaging Problem Statement The decision between OpenSSL 3.5 and 4.0 for an NGINX fleet is a question of support windows and migration cost, not feature parity. OpenSSL 4.0 shipped in April 2026 but is explicitly not an LTS release. Under the project's policy, non-LTS branches receive only 13 months of support. OpenSSL 3.5 is the current LTS, supported until April 2030. Moving an NGINX fleet from 3.5 to 4.0 today would cut the support window…

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