CVE-2026-25223 - Fastify's Content-Type header tab character allows body validation bypass

CVE-2026-25223 - Fastify's Content-Type header tab character allows body validation bypass

https://cvefeed.io/rssfeed/latest.atom / Wed, 02/04/2026 - 05:00
CVE ID : CVE-2026-25223
Published : Feb. 3, 2026, 10:16 p.m. | 5 hours, 2 minutes ago
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.
Severity: 7.5 | HIGH
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