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I. Basic Information for CVE-2026-25223
Vulnerability Information

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Vulnerability Title
Fastify's Content-Type header tab character allows body validation bypass
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
解释冲突
Source: NVD (National Vulnerability Database)
Vulnerability Title
Fastify 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fastify是Fastify开源的一个 Web 框架。 Fastify 5.7.2之前版本存在安全漏洞,该漏洞源于请求正文验证模式可被完全绕过,可能导致攻击者绕过正文验证。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
fastifyfastify < 5.7.2 -
II. Public POCs for CVE-2026-25223
#POC DescriptionSource LinkShenlong Link
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Qwen3.5-35B-A3B-UD-Q4_K_XL.gguf · 7432 chars
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III. Intelligence Information for CVE-2026-25223
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IV. Related Vulnerabilities
V. Comments for CVE-2026-25223

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