{"cve":"CVE-2020-8184","nvd":{"published":"2020-06-19T17:15:18.757","modified":"2026-06-17T03:26:00.600","status":"Modified","description":"A reliance on cookies without validation/integrity check security vulnerability exists in rack < 2.2.3, rack < 2.1.4 that makes it is possible for an attacker to forge a secure or host-only cookie prefix.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},"cwes":["CWE-20","CWE-784"],"references":["https://groups.google.com/g/rubyonrails-security/c/OWtmozPH9Ak","https://hackerone.com/reports/895727","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":"2026-10-19T21:05:42.039641217+00:00"},"epss":{"cve":"CVE-2020-8184","score":0.02938,"percentile":0.87109,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-j6w9-fv6q-3q52","url":"https://osv.dev/vulnerability/GHSA-j6w9-fv6q-3q52","summary":"Rack allows Percent-encoded cookies to overwrite existing prefixed cookie names","modified":"2026-09-10T03:49:25.325945900Z","packages":[{"ecosystem":"RubyGems","name":"rack","purl":"pkg:gem/rack","ranges":["<2.1.4"],"fixed":["2.1.4"]},{"ecosystem":"RubyGems","name":"rack","purl":"pkg:gem/rack","ranges":[">=2.2.0 <2.2.3"],"fixed":["2.2.3"]}]}],"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."]}