# Fastify v5.8.5

- Product: Fastify (https://whatsnew.fyi/product/fastify)
- Vendor: Fastify
- Date: 2026-04-14
- Version: v5.8.5
- Original notes: https://github.com/fastify/fastify/releases/tag/v5.8.5
- Permalink: https://whatsnew.fyi/product/fastify/releases/v5.8.5

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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- **security** — Fix CVE-2026-33806
- **fixed** — Restore trustProxy function for number and string types and add null check for socketAddr
- **fixed** — Fix port parsing

##### ⚠️ Security Release

This fixes CVE CVE-2026-33806 https://github.com/fastify/fastify/security/advisories/GHSA-247c-9743-5963.

##### What's Changed
* chore: Fix port parsing by @jsumners in https://github.com/fastify/fastify/pull/6603
* chore: upgrade to typescript v6.0.2 by @Tony133 in https://github.com/fastify/fastify/pull/6605
* fix: restore trustProxy function for number and string types, add null check for socketAddr by @mcollina in https://github.com/fastify/fastify/pull/6613
* ci: reduce cron scheduled workflows from daily/weekly to monthly by @Fdawgs in https://github.com/fastify/fastify/pull/6623
* chore: Bump pnpm/action-setup from 4.2.0 to 5.0.0 by @dependabot[bot] in https://github.com/fastify/fastify/pull/6629
* chore: Bump markdownlint-cli2 from 0.21.0 to 0.22.0 by @dependabot[bot] in https://github.com/fastify/fastify/pull/6632
* chore: Bump borp from 0.21.0 to 1.0.0 by @dependabot[bot] in https://github.com/fastify/fastify/pull/6633
* chore: Bump actions/dependency-review-action from 4.8.3 to 4.9.0 by @dependabot[bot] in https://github.com/fastify/fastify/pull/6630
* docs(ecosystem): add @pompelmi/fastify-plugin by @SonoTommy in https://github.com/fastify/fastify/pull/6610

##### New Contributors
* @SonoTommy made their first contribution in https://github.com/fastify/fastify/pull/6610

**Full Changelog**: https://github.com/fastify/fastify/compare/v5.8.4...v5.8.5