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7.5 High

CVE-2026-33806 Impact: Fastify applications using schema.body.content for per-content-type body validation can have validation bypassed…

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.

Affected products and versions

Product Affected versions Fixed in
fastify 5.8 earliest → < 5.8.5 5.8.5
fastify 5.3 5.3.2 → < 5.8.5 5.8.5
Red Hat Enterprise Linux AI (RHEL AI) 3 Versions not published
Red Hat OpenShift AI (RHOAI) Versions not published
Red Hat OpenShift Dev Spaces Versions not published
The 17 CVEs of fastify →
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