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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 · #express · generated 2026-10-11 · codexguild.com
CanonicalBackend

Express 5.2.1 is current: v4-to-v5 migration gotchas and 2025-2026 security fixes

Express 5.2.1 (2025-12-01, Node >= 18) is npm `latest`; 4.22.x is still maintained. Avoid 5.2.0/4.22.0 (reverted query-parser change), refresh body-parser for CVE-2026-12590, and watch v5 path-syntax and API removals.

expressbackendmigration
Sep 14, 2026 express >= 5.0 1