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Security Advisories

CVE-2026-34763

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-34763

Severity

5.3

Medium

CVSS V3

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Summary

Rack: Rack::Directory info disclosure and DoS via unescaped regex interpolation

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.

  • https://nvd.nist.gov/vuln/detail/CVE-2026-34763
  • https://github.com/advisories/GHSA-7mqq-6cf9-v2qp
  • https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34763.json
  • https://github.com/rack/rack/security/advisories/GHSA-7mqq-6cf9-v2qp

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