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7/16/2026
The original title is: ".NET 8 and .NET 9 Both Reach End of Support on November 10, 2026"

The original title is: ".NET 8 and .NET 9 Both Reach End of Support on November 10, 2026"

Original: .NET 8 and .NET 9 Both Die on November 10 - Yes, the LTS Too

Short summary

.NET 8 (LTS) and .NET 9 (STS) both reach end of support on November 10, 2026, leaving all modern .NET apps without security patches. .NET 10 (LTS, supported to 2028) is the upgrade target, and most migrations are straightforward retargets. The post also catalogs a brutal H2 2026 EOL calendar including SQL Server 2016, OpenSSL 3.0, Python 3.10, PostgreSQL 14, and PHP 8.2.

  • •.NET 8 and .NET 9 both EOL on November 10, 2026 despite different support tracks
  • •.NET 10 LTS is the upgrade target, supported through November 2028
  • •H2 2026 has a dense EOL calendar across SQL Server, OpenSSL, Python, PostgreSQL, and PHP

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