CVE-2026-34785
HIGH EPSS 23.2%
Published Apr 2, 20262mo ago · Modified Jun 17, 20261w ago
7.5 CVSS 3.1
Published Apr 2, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None
Threat Intelligence
EPSS Exploit Probability
23.2% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 2
CWE-187
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor Information Exposure
Affected Products 3
References 1
- github.com https://github.com/rack/rack/security/advisories/GHSA-h2jq-g4cq-5ppq
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.