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X25519-only TLS ends for GHE.com on October 7

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GitHub·Sep 30, 2026, 01:30 PMDeprecationMay break your integrationAI-assisted summary

Summary

TLS connections offering only X25519 key agreement will be rejected after Oct 7 2026 for GitHub Enterprise Cloud with data residency
Clients that rely solely on X25519 for TLS key agreement must add support for other algorithms to maintain connectivity
This change may cause service disruption for affected clients, requiring configuration updates

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Official source Last checked Oct 5, 2026, 10:03 AM

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