{"id":"CVE-2021-44528","aliases":["BIT-rails-2021-44528","GHSA-qphc-hf5q-v8fc"],"url":"https://o3.security/vulnerability/CVE-2021-44528","summary":"actionpack Open Redirect in Host Authorization Middleware","details":"A open redirect vulnerability exists in Action Pack >= 6.0.0 that could allow an attacker to craft a \"X-Forwarded-Host\" headers in combination with certain \"allowed host\" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website.","published":"2022-01-10T14:10:26.117Z","modified":"2026-08-07T19:47:06.198251Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":{"score":0.04182,"percentile":0.90187,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"RubyGems","name":"actionpack","fixedVersion":"6.0.4.2"},{"ecosystem":"RubyGems","name":"actionpack","fixedVersion":"6.1.4.2"}],"fix":{"url":"https://github.com/rails/rails/commit/0fccfb9a3097a9c4260c791f1a40b128517e7815","label":"rails/rails@0fccfb9"},"references":[{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20240208-0003/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2023/dsa-5372"},{"type":"FIX","url":"https://github.com/rails/rails/commit/0fccfb9a3097a9c4260c791f1a40b128517e7815"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T19:47:06.198251Z"}}