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CVE-2020-36327

30
FAUCET Score

CVE-2020-36327 describes a dependency confusion vulnerability in Bundler versions 1.16.0 through 2.2.9 and 2.2.11 through 2.2.16, where the package manager might prioritize a higher version number from a public source over an intended private gem. This affects various Bundler distributions and related configurations. The vulnerability carries a high CVSS score of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H), indicating it can be exploited remotely with low attack complexity, potentially leading to high confidentiality, integrity, and availability impacts. While the vulnerability has a high FAUCET Risk Score of 91/100 and an elevated EPSS score, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.16.0, < 2.2.10CPE matchmatch criteria
cpe:2.3:a:bundler:bundler:*:*:*:*:*:ruby:*:*
>= 2.2.11, <= 2.2.16CPE matchmatch criteria
cpe:2.3:a:bundler:bundler:*:*:*:*:*:ruby:*:*
34CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:microsoft:package_manager_configurations:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
6.31%
Probability of exploitation in next 30 days
EPSS Percentile
92.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0631 is in the 92nd percentile among its peer group of 14,852 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (21)

microsoftpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.1 Update Services for SAP SolutionsFixed in: ruby:2.6-8010020220201152941.c27ad7f8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Extended Update SupportFixed in: ruby:2.5-8040020220201123518.522a0ee4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-ruby27-ruby-0:2.7.4-130.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-ruby30-ruby-0:3.0.2-148.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-ruby26-ruby-0:2.6.9-120.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSFixed in: rh-ruby27-ruby-0:2.7.4-130.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSFixed in: rh-ruby30-ruby-0:3.0.2-148.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: ruby:2.7-8040020210728141159.522a0ee4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: ruby:2.6-8050020211215144356.c5368500
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: ruby:2.5-8050020220112131355.c5368500
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.1 Update Services for SAP SolutionsFixed in: ruby:2.5-8010020220201125517.c27ad7f8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Extended Update SupportFixed in: ruby:2.5-8020020220201125131.4cda2c84
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Extended Update SupportFixed in: ruby:2.6-8020020220201131207.4cda2c84
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Extended Update SupportFixed in: ruby:2.6-8040020220131135901.522a0ee4
View patch
rubygemspatch availablevia ghsa
Product: bundlerFixed in: 2.2.18
rubygemspatch availablevia ghsa
Product: bundlerFixed in: 2.2.10
redhatvendor investigatingvia redhat_api
Product: Red Hat 3scale API Management Platform 2Fixed in: rubygem-bundler
redhatno patchvia redhat_api
Product: Logging Subsystem for Red Hat OpenShiftFixed in: ruby
redhatend of lifevia redhat_api
Product: CloudForms Management Engine 5Fixed in: rubygem-bundler
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-ruby25-rubygem-bundler

Vendor Advisories (2)

rubygemsGHSA-fp4w-jxhp-m23phigh

Dependency Confusion in Bundler

May 24, 2021
redhatCVE-2020-36327Important

rubygem-bundler: Dependencies of gems with explicit source may be installed from a different source

Feb 9, 2021

References

bundler.io / blog/2021/02/15/a-more-secure-bundler-we-fixed-our-source-priorities.html
Vendor Advisory
github.com / rubygems/rubygems/issues/3982
ExploitIssue TrackingThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/MWXHK5UUHVSHF7HTHMX6JY3WXDVNIHSL
mensfeld.pl / 2021/02/rubygems-dependency-confusion-attack-side-of-things
Third Party Advisory
msrc.microsoft.com / update-guide/en-US/vulnerability/CVE-2021-24105
PatchVendor Advisory
zofrex.com / blog/2021/04/29/bundler-still-vulnerable-dependency-confusion-cve-2020-36327
ExploitThird Party Advisory