{"cve":"CVE-2020-8161","nvd":{"published":"2020-07-02T19:15:12.357","modified":"2026-06-17T03:25:57.960","status":"Modified","description":"A directory traversal vulnerability exists in rack < 2.2.0 that allows an attacker perform directory traversal vulnerability in the Rack::Directory app that is bundled with Rack which could result in information disclosure.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","score":8.6},"cwes":["CWE-22","CWE-548"],"references":["https://groups.google.com/g/rubyonrails-security/c/IOO1vNZTzPA","https://hackerone.com/reports/434404","https://lists.debian.org/debian-lts-announce/2020/07/msg00006.html","https://lists.debian.org/debian-lts-announce/2023/01/msg00038.html","https://usn.ubuntu.com/4561-1/"],"products":["canonical:ubuntu_linux","debian:debian_linux","rack_project:rack"],"source":"nvd","synced_at":"2026-10-19T21:06:22.076270124+00:00"},"epss":{"cve":"CVE-2020-8161","score":0.03359,"percentile":0.88719,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-5f9h-9pjv-v6j7","url":"https://osv.dev/vulnerability/GHSA-5f9h-9pjv-v6j7","summary":"Directory traversal in Rack::Directory app bundled with Rack","modified":"2026-09-10T03:48:48.075561980Z","packages":[{"ecosystem":"RubyGems","name":"rack","purl":"pkg:gem/rack","ranges":["<2.1.3"],"fixed":["2.1.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}