CVE-2026-34763
Published:April 02, 2026
Updated:April 08, 2026
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.
Affected Packages
rack (RUBY):
Affected version(s) >=3.2.0 <3.2.6Fix Suggestion:
Update to version 3.2.6rack (RUBY):
Affected version(s) >=0.1.0 <2.2.23Fix Suggestion:
Update to version 2.2.23rack (RUBY):
Affected version(s) >=3.0.0.beta1 <3.1.21Fix Suggestion:
Update to version 3.1.21Related Resources (3)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Permissive Regular Expression
EPSS
Base Score:
0.03
