Deprecating the DHE cipher suite for TLS connections
Vercel will remove support for the DHE-RSA-AES256-GCM-SHA384 cipher suite on June 30th, 2026. Clients using TLS 1.2 must support one of the remaining six cipher suites (ECDHE-based); TLS 1.3 and modern clients are unaffected.
On June 30th, 2026, Vercel will remove support for the legacy cipher suite.DHE-RSA-AES256-GCM-SHA384
This cipher may still be used by automated systems, security scanners, and HTTP clients with non-standard TLS configurations.
After this date, clients using TLS 1.2 will only be able to connect to the Vercel network with :our six remaining cipher suites
Modern clients and TLS 1.3 connections are unaffected.
If you operate integrations or automated systems that connect to a domain hosted on Vercel over TLS 1.2, verify that your TLS client supports at least one of the above cipher suites. Modern TLS libraries support these by default.
ECDHE-ECDSA-AES128-GCM-SHA256ECDHE-RSA-AES128-GCM-SHA256ECDHE-ECDSA-AES256-GCM-SHA384ECDHE-RSA-AES256-GCM-SHA384ECDHE-ECDSA-CHACHA20-POLY1305ECDHE-RSA-CHACHA20-POLY1305
Source: original entry ↗
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