CVE-2020-36327
HIGH8.8EPSS 27.1%Dependency Confusion in Bundler
Published: 5/24/2021Modified: 4/28/2026
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.
Affected packages (2)
- Debian/rubygemsfrom 0
- RubyGems/bundler>= 1.16.0, < 2.2.10
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
References (13)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2020-36327
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2020-36327
- PATCHhttps://github.com/rubygems/rubygems
- WEBhttps://bundler.io/blog/2021/02/15/a-more-secure-bundler-we-fixed-our-source-priorities.html
- WEBhttps://github.com/rubygems/rubygems/blob/master/bundler/CHANGELOG.md#2218-may-25-2021
- WEBhttps://github.com/rubygems/rubygems/commit/078bf682ac40017b309b5fc69f283ff640e7c129
- WEBhttps://github.com/rubygems/rubygems/issues/3982
- WEBhttps://github.com/rubygems/rubygems/pull/4609
- WEBhttps://github.com/rubysec/ruby-advisory-db/blob/master/gems/bundler/CVE-2020-36327.yml
- WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/MWXHK5UUHVSHF7HTHMX6JY3WXDVNIHSL
- WEBhttps://mensfeld.pl/2021/02/rubygems-dependency-confusion-attack-side-of-things
- WEBhttps://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-24105
- WEBhttps://www.zofrex.com/blog/2021/04/29/bundler-still-vulnerable-dependency-confusion-cve-2020-36327