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Vercel is deprecating the legacy DHE-RSA-AES256-GCM-SHA384 cipher suite for TLS connections effective June 30th, 2026.
•The deprecated cipher is still used by automated systems, security scanners, and HTTP clients with non-standard TLS configurations
•After the deprecation date, TLS 1.2 clients must use one of six supported cipher suites: ECDHE-ECDSA-AES128-GCM-SHA256, ECDHE-RSA-AES128-GCM-SHA256, ECDHE-ECDSA-AES256-GCM-SHA384, ECDHE-RSA-AES256-GCM-SHA384, ECDHE-ECDSA-CHACHA20-POLY1305, or ECDHE-RSA-CHACHA20-POLY1305
•Modern clients and TLS 1.3 connections are unaffected by this change
•Operators of integrations or automated systems connecting to Vercel-hosted domains over TLS 1.2 should verify their TLS client supports at least one of the listed cipher suites
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Modern TLS libraries already support these cipher suites by default
This summary was automatically generated by AI based on the original article and may not be fully accurate.
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