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CVE-2026-22860— Rack has a Directory Traversal via Rack:Directory

Quick assessment

Affected
rack rack
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Rack是Rack开源的一个模块化的Ruby web服务器界面。 Rack 2.2.22之前版本、3.1.20之前版本和3.2.5之前版本存在安全漏洞，该漏洞源于Rack::Directory的路径检查使用字符串前缀匹配，可能导致目录遍历，允许列出预期根目录之外的内容。

CVSS 7.5 · High EPSS 0.68% · P51

Affected Version Matrix 3

VendorProduct Version RangeStatus
rack rack < 2.2.22 affected
>= 3.0.0.beta1, < 3.1.20 affected
>= 3.2.0, < 3.2.5 affected
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I. Basic Information for CVE-2026-22860

Vulnerability Information
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Vulnerability Title
Rack has a Directory Traversal via Rack:Directory
Source: CVE Program / CVE List V5
Vulnerability Description
Rack is a modular Ruby web server interface. Prior to versions 2.2.22, 3.1.20, and 3.2.5, `Rack::Directory`’s path check used a string prefix match on the expanded path. A request like `/../root_example/` can escape the configured root if the target path starts with the root string, allowing directory listing outside the intended root. Versions 2.2.22, 3.1.20, and 3.2.5 fix the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Rack 安全漏洞
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 2.2.22之前版本、3.1.20之前版本和3.2.5之前版本存在安全漏洞，该漏洞源于Rack::Directory的路径检查使用字符串前缀匹配，可能导致目录遍历，允许列出预期根目录之外的内容。
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

Vendor Product Affected Versions CPE Subscribe
rack rack < 2.2.22 -

II. Public POCs for CVE-2026-22860

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III. Intelligence Information for CVE-2026-22860

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Vendor Advisories for CVE-2026-22860 (1)

IV. Related Vulnerabilities

Same product: rack
Same vendor: rack
Same weakness: CWE-22

V. Comments for CVE-2026-22860

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