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refactor: bind warning state to Fastify instance via kWarnings

Status: Open.

#6729 In fastify/fastify;

· aquie00t opened on May 19, 2026

Integer validation doesn't fail on Infinity

Status: Open.

#6718 In fastify/fastify;

· barbeque-squared opened on May 8, 2026

Parametric Route with RegExp Misbehaving, undefined on empty string even though regex doesn't match

Status: Open.

#6700 In fastify/fastify;

· Orel-A opened on Apr 29, 2026

request.port is invalid

Status: Open.

#6671 In fastify/fastify;

· ChALkeR opened on Apr 18, 2026

Incompatibility between passport "authenticate" method return type and "preValidation" type

Status: Open.

#6576 In fastify/fastify;

· ipanacci opened on Mar 11, 2026

Fastify v6: Remove fast-json-stringify and enable response validation via Ajv

Status: Open.

#6507 In fastify/fastify;

· mcollina opened on Feb 14, 2026

Question: harden request.hostname/request.host parsing?

Status: Open.

#6477 In fastify/fastify;

· mcollina opened on Jan 31, 2026

Become Railway open-source partner?

Status: Open.

#6473 In fastify/fastify;

· smith558 opened on Jan 30, 2026

Grab ReplyType from the reply parameters in a route function

Status: Open.

#6469 In fastify/fastify;

· segevfiner opened on Jan 28, 2026

Closure of HackerOne

documentationImprovements or additions to documentationImprovements or additions to documentation

notable-changeA change that should be explicitly outlined in release notes and migration guidesA change that should be explicitly outlined in release notes and migration guides

Status: Open.

#6468 In fastify/fastify;

· mcollina opened on Jan 28, 2026

Improve schema compilation time when getSchema is used

Status: Open.

#6454 In fastify/fastify;

· Eomm opened on Jan 17, 2026

Unknown or any in nested body schema property makes entire body become unknown

Status: Open.

#6401 In fastify/fastify;

· LBBO opened on Dec 2, 2025