CVE-2026-34763 - Medium Severity Vulnerability
Vulnerable Library - rack-2.2.22.gem
Rack provides a minimal, modular and adaptable interface for developing
web applications in Ruby. By wrapping HTTP requests and responses in
the simplest way possible, it unifies and distills the API for web
servers, web frameworks, and software in between (the so-called
middleware) into a single method call.
Library home page: https://rubygems.org/gems/rack-2.2.22.gem
Path to dependency file: /Gemfile.lock
Path to vulnerable library: /tmp/containerbase/cache/.ruby/cache/rack-2.2.22.gem
Dependency Hierarchy:
- ❌ rack-2.2.22.gem (Vulnerable Library)
Found in base branch: master
Vulnerability Details
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.
Publish Date: 2026-04-02
URL: CVE-2026-34763
CVSS 3 Score Details (5.3)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: Low
- Integrity Impact: None
- Availability Impact: None
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Origin: GHSA-7mqq-6cf9-v2qp
Release Date: 2026-04-02
Fix Resolution: rack - 3.2.6,rack - 2.2.23,rack - 3.1.21
Step up your Open Source Security Game with Mend here
CVE-2026-34763 - Medium Severity Vulnerability
Rack provides a minimal, modular and adaptable interface for developing web applications in Ruby. By wrapping HTTP requests and responses in the simplest way possible, it unifies and distills the API for web servers, web frameworks, and software in between (the so-called middleware) into a single method call.
Library home page: https://rubygems.org/gems/rack-2.2.22.gem
Path to dependency file: /Gemfile.lock
Path to vulnerable library: /tmp/containerbase/cache/.ruby/cache/rack-2.2.22.gem
Dependency Hierarchy:
Found in base branch: master
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.
Publish Date: 2026-04-02
URL: CVE-2026-34763
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: Low
- Integrity Impact: None
- Availability Impact: None
For more information on CVSS3 Scores, click here.Type: Upgrade version
Origin: GHSA-7mqq-6cf9-v2qp
Release Date: 2026-04-02
Fix Resolution: rack - 3.2.6,rack - 2.2.23,rack - 3.1.21
Step up your Open Source Security Game with Mend here