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CVE-2026-33806

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CVSS 3.1
7.5 high
EPSS
<1%p38
Published
()
Modified
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.

Vendors
fastify
Products
fastify
Weakness
CWE-1287, CWE-1289
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD CVE.org GitHub PoCs EPSS (0.4%)

In the news

No ingested article mentions this CVE yet.