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CVE-2026-25223

🔴 HIGH

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-Ty...

Published
Feb 03, 2026
Last Modified
Feb 10, 2026
Views
5
Bookmarks
0

Description

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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.

Affected Products (1)

fastify - fastify

Version: *

CVSS Scores

CVSS 3.1 7.5
7.5
HIGH
CVSS 2.0 7.5

References

fastify.dev github.com github.com github.com github.com hackerone.com

Additional Information

Source
security-advisories@github.com
State
Analyzed

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