{"cve":"CVE-2015-7576","nvd":{"published":"2016-02-16T02:59:00.110","modified":"2026-06-17T00:32:46.760","status":"Modified","description":"The http_basic_authenticate_with method in actionpack/lib/action_controller/metal/http_authentication.rb in the Basic Authentication implementation in Action Controller in Ruby on Rails before 3.2.22.1, 4.0.x and 4.1.x before 4.1.14.1, 4.2.x before 4.2.5.1, and 5.x before 5.0.0.beta1.1 does not use a constant-time algorithm for verifying credentials, which makes it easier for remote attackers to bypass authentication by measuring timing differences.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","score":3.7},"cwes":["CWE-254"],"references":["http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178043.html","http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178047.html","http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178067.html","http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178068.html","http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00053.html"],"products":["rubyonrails:rails","rubyonrails:ruby_on_rails"],"source":"nvd","synced_at":"2026-10-19T20:37:48.328043465+00:00"},"epss":{"cve":"CVE-2015-7576","score":0.04879,"percentile":0.92062,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-p692-7mm3-3fxg","url":"https://osv.dev/vulnerability/GHSA-p692-7mm3-3fxg","summary":"actionpack is vulnerable to remote bypass authentication","modified":"2024-11-29T05:33:41.128332Z","packages":[{"ecosystem":"RubyGems","name":"actionpack","purl":"pkg:gem/actionpack","ranges":[">=3.1.0 <3.2.22.1"],"fixed":["3.2.22.1"]},{"ecosystem":"RubyGems","name":"actionpack","purl":"pkg:gem/actionpack","ranges":[">=4.0.0 <4.1.14.1"],"fixed":["4.1.14.1"]}]}],"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."]}