{"cve":"CVE-2020-36327","nvd":{"published":"2021-04-29T03:15:08.710","modified":"2026-10-08T21:17:30.120","status":"Modified","description":"Bundler 1.16.0 through 2.2.9 and 2.2.11 through 2.2.16 sometimes chooses a dependency source based on the highest gem version number, which means that a rogue gem found at a public source may be chosen, even if the intended choice was a private gem that is a dependency of another private gem that is explicitly depended on by the application. NOTE: it is not correct to use CVE-2021-24105 for every \"Dependency Confusion\" issue in every product.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":8.8},"cwes":[],"references":["https://bundler.io/blog/2021/02/15/a-more-secure-bundler-we-fixed-our-source-priorities.html","https://github.com/rubygems/rubygems/issues/3982","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MWXHK5UUHVSHF7HTHMX6JY3WXDVNIHSL/","https://mensfeld.pl/2021/02/rubygems-dependency-confusion-attack-side-of-things/","https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-24105"],"products":["bundler:bundler","fedoraproject:fedora","microsoft:package_manager_configurations"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2020-36327","score":0.06307,"percentile":0.93557,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-fp4w-jxhp-m23p","url":"https://osv.dev/vulnerability/GHSA-fp4w-jxhp-m23p","summary":"Dependency Confusion in Bundler","modified":"2024-12-05T05:42:55.716134Z","packages":[{"ecosystem":"RubyGems","name":"bundler","purl":"pkg:gem/bundler","ranges":[">=1.16.0 <2.2.10"],"fixed":["2.2.10"]},{"ecosystem":"RubyGems","name":"bundler","purl":"pkg:gem/bundler","ranges":[">=2.2.11 <2.2.18"],"fixed":["2.2.18"]}]}],"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."]}