CVE-2026-33806highCWE-1287CWE-1289

CVE-2026-33806: falha de alta gravidade em fastify

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

Publicada em · Atualizada em

Seguir esta CVE+ Monitorar fastify+ Monitorar fastify

Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.

21Vexday Risk Score

Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.

ssvc Trackcvss 7.5epss 0.4%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Produtos afetados
fastify · fastify
CVEs relacionadas — fastify

No mesmo produto, das mais perigosas para as menos.

CVE-2022-39288HIGHDenial of service in Fastify via Content-Type headerEPSS 59.2%CVE-2026-25223HIGHFastify's Content-Type header tab character allows body validation bypassEPSS 0.9%CVE-2025-32442HIGHFastify vulnerable to invalid content-type parsing, which could lead to validation bypassEPSS 0.7%CVE-2026-25224LOWFastify Vulnerable to DoS via Unbounded Memory Allocation in sendWebStreamEPSS 0.5%CVE-2026-76169HIGHfastify vulnerable to authentication bypass via malformed URLs reaching encapsulated not-found handlersEPSS 0.5%CVE-2026-84428HIGHfastify vulnerable to header validation bypass via incomplete schema case normalizationEPSS 0.5%