Is CVE-2026-34763 actively exploited?

CVE-2026-34763 has no public evidence of in-the-wild exploitation as of 2026-04-16.

What is the CVSS score for CVE-2026-34763?

CVE-2026-34763 has a CVSS score of 5.3 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

How do I patch CVE-2026-34763?

Patch guidance is available from rack security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-34763.

Which products are affected by CVE-2026-34763?

3 products: rack rack, rack rack, rack rack.

CVE-2026-34763 - remediation guidance & executive summary

Description

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: low
Integrity: none
Availability: none
Weaknesses: CWE-625

Metadata

Primary Vendor: RACK
Published: 4/2/2026
Last Modified: 4/16/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2026-34763

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary