# Uvicorn 0.48.0 — Version 0.48.0

- Product: Uvicorn (https://whatsnew.fyi/product/uvicorn)
- Vendor: Encode
- Date: 2026-05-24
- Version: 0.48.0
- Original notes: https://github.com/Kludex/uvicorn/releases/tag/0.48.0
- Permalink: https://whatsnew.fyi/product/uvicorn/releases/0.48.0

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **changed** — Default ssl_ciphers to None and use OpenSSL defaults
- **changed** — Ignore duplicate forwarding headers in ProxyHeadersMiddleware

##### What's Changed
* Default `ssl_ciphers` to `None` and use OpenSSL defaults by @Kludex in https://github.com/Kludex/uvicorn/pull/2940
* Ignore duplicate forwarding headers in `ProxyHeadersMiddleware` by @Kludex in https://github.com/Kludex/uvicorn/pull/2944

**Full Changelog**: https://github.com/Kludex/uvicorn/compare/0.47.0...0.48.0