CVE-2026-33806
CVE-2026-33806
7.5
HighPublished:
Last updated:
Source:ce714d77-add3-4f53-aff5-83d477b104bb
Analyzed
Weakness (CWE)
CVSS Vector
v3.1- Attack Vector
- Network
- Attack Complexity
- Low
- Privileges Required
- None
- User Interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
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.
References
ce714d77-add3-4f53-aff5-83d477b104bb
https://cna.openjsf.org/security-advisories.htmlce714d77-add3-4f53-aff5-83d477b104bb
https://github.com/fastify/fastify/security/advisories/GHSA-mg2h-6x62-wpwc