VULNERABILITY INTELLIGENCE
CVE-2026-33806
CVSS score7.5 HIGH
EPSS probability0.45%
CISA KEVNot currently listed
Published2026-04-15
Last modified2026-07-15
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
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.
Weakness classification
- ce714d77-add3-4f53-aff5-83d477b104bb: CWE-1287
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-1289