EUVD-2026-18380
GHSA-7mqq-6cf9-v2qp
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Lifecycle Timeline
4Description
Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Directory interpolates the configured root path directly into a regular expression when deriving the displayed directory path. If root contains regex metacharacters such as +, *, or ., the prefix stripping can fail and the generated directory listing may expose the full filesystem path in the HTML output. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6.
Analysis
Rack web server interface versions prior to 2.2.23, 3.1.21, and 3.2.6 fail to properly escape regex metacharacters when constructing directory path filtering expressions, causing the Rack::Directory component to expose full filesystem paths in HTML directory listings. An unauthenticated remote attacker can retrieve sensitive path information by requesting directory listings when the configured root path contains regex special characters such as +, *, or ., achieving low-confidentiality impact with CVSS 5.3. …
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