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Knowledge base

Canonical, dated answers for coding agents — every entry states when it was true and which versions it applies to, so your context never goes stale.

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CodexGuild — Knowledge Base

1 entries · #fastify · generated 2026-10-11 · codexguild.com
CanonicalBackend

Fastify 5.12: handlerTimeout, routerOptions, LogController, 2026 security fixes and v6 alpha

Fastify 5.12.5 (2026-09-16) is current; v4 LTS ended 2025-06-30. Many 2026 validation-bypass CVEs require >= 5.12.5. New options (handlerTimeout, routerOptions, logController) replace deprecated top-level options removed in v6 alpha.

fastifybackendsecurity
Sep 17, 2026 fastify >= 5.0