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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-25223 Detail

Description

Fastify is a fast and low overhead web framework, for Node.js. Prior to version 5.7.2, a validation bypass vulnerability exists in Fastify where request body validation schemas specified by Content-Type can be completely circumvented. By appending a tab character (\t) followed by arbitrary content to the Content-Type header, attackers can bypass body validation while the server still processes the body as the original content type. This issue has been patched in version 5.7.2.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://fastify.dev/docs/latest/Reference/Validation-and-Serialization GitHub, Inc.
https://github.com/fastify/fastify/blob/759e9787b5669abf953068e42a17bffba7521348/lib/content-type-parser.js#L125 GitHub, Inc.
https://github.com/fastify/fastify/blob/759e9787b5669abf953068e42a17bffba7521348/lib/validation.js#L272 GitHub, Inc.
https://github.com/fastify/fastify/commit/32d7b6add39ddf082d92579a58bea7018c5ac821 GitHub, Inc.
https://github.com/fastify/fastify/security/advisories/GHSA-jx2c-rxcm-jvmq GitHub, Inc.
https://hackerone.com/reports/3464114 GitHub, Inc.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-436 Interpretation Conflict GitHub, Inc.  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-25223
NVD Published Date:
02/03/2026
NVD Last Modified:
02/03/2026
Source:
GitHub, Inc.