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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| fastify | fastify | 5.3.2 – < 5.8.5 | 5.8.5 |