Overview

Litestar 2.20, released on February 8, 2026, improves DTO schemas and fixes CORS issues.

Main Features

DTO schemas

DTO (Data Transfer Object) schemas benefit from more precise automatic generation and better OpenAPI documentation.

python 
from litestar import Litestar, post
from litestar.dto import DTOConfig
from dataclasses import dataclass

@dataclass
class Article:
    id: int
    title: str
    content: str

@post('/articles', dto=DTOConfig(exclude={'id'}))
async def create(data: Article) -> Article:
    return data

CORS fixes

Several CORS fixes improve preflight header handling and compatibility with modern browsers.

Sources