CVE-2026-33806 - fastify vulnerable to Body Schema Validation Bypass via Leading Space in Content-Type Header

CVE-2026-33806 - fastify vulnerable to Body Schema Validation Bypass via Leading Space in Content-Type Header

https://cvefeed.io/rssfeed/latest.atom / Wed, 04/15/2026 - 04:01
CVE ID :CVE-2026-33806
Published : April 15, 2026, 12:14 a.m. | 1 hour, 26 minutes ago
Description :Impact: Fastify applications using schema.body.content for per-content-type body validation can have validation bypassed entirely by prepending a space to the Content-Type header. The body is still parsed correctly but schema validation is skipped. This is a regression introduced in fastify >= 5.3.2 by the fix for CVE-2025-32442 Patches: Upgrade to fastify v5.8.5 or later. Workarounds: None. Upgrade to the patched version.
Severity: 7.5 | HIGH
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