v12.0.0

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NestJS·Aug 27, 2026, 12:23 PMDeprecationMay break your integrationAI-assisted summary

Summary

Core packages are now ESM‑only (Node 20.19+/22.12+ required); CommonJS apps keep working via require(esm) but may need to adjust bootstrapping, bundlers and test runners.
Standard Schema support added for validation, serialization and config (e.g., @Body(), @Query() accept schemas, ConfigModule validationSchema now accepts any standard schema).
CLI rebuilt: now ESM, uses Vitest for ESM projects, rspack as default bundler, oxlint replaces ESLint, and new commands (nest upgrade, nest deploy) added; several old workflows (webpack flags, angular schematic) deprecated or removed.

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Official source Last checked Sep 8, 2026, 2:02 AM

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