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I. Basic Information for CVE-2026-34785
Vulnerability Information

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Vulnerability Title
Rack: Local file inclusion in `Rack::Static` via URL Prefix Matching
Source: NVD (National Vulnerability Database)
Vulnerability Description
Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Static determines whether a request should be served as a static file using a simple string prefix check. When configured with URL prefixes such as "/css", it matches any request path that begins with that string, including unrelated paths such as "/css-config.env" or "/css-backup.sql". As a result, files under the static root whose names merely share the configured prefix may be served unintentionally, leading to information disclosure. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
部分比较
Source: NVD (National Vulnerability Database)
Vulnerability Title
Rack 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rack是Rack开源的一个模块化的Ruby web服务器界面。 Rack 2.2.23之前版本、3.1.21之前版本和3.2.6之前版本存在信息泄露漏洞,该漏洞源于Rack::Static使用简单的字符串前缀检查来确定是否应将请求作为静态文件提供,可能导致信息泄露。
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
rackrack < 2.2.23 -
II. Public POCs for CVE-2026-34785
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III. Intelligence Information for CVE-2026-34785
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