CVE-2020-36327

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2020-36327
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-04-29 03:15:08 UTC
Updated2026-10-08 21:17:30 UTC
DescriptionBundler 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

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

EPSS: 0.063070000 probability, percentile 0.934440000 (date 2026-10-10)

Problem Types: NVD-CWE-noinfo | n/a

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
2.0[email protected]Primary9.3AV:N/AC:M/Au:N/C:C/I:C/A:C

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Medium
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete

AV:N/AC:M/Au:N/C:C/I:C/A:C

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Bundler Bundler All All All All
Application Bundler Bundler All All All All
Operating System Fedoraproject Fedora 34 All All All
Application Microsoft Package Manager Configurations - All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Bundler is Still Vulnerable to Dependency Confusion Attacks (CVE⁠-⁠2020⁠-⁠36327) | zofrex.com af854a3a-2127-422b-91ae-364da2661108 www.zofrex.com Exploit, Third Party Advisory
Security Update Guide - Microsoft Security Response Center af854a3a-2127-422b-91ae-364da2661108 msrc.microsoft.com Patch, Vendor Advisory
RubyGems dependency confusion attack side of things - Running with Ruby af854a3a-2127-422b-91ae-364da2661108 mensfeld.pl Third Party Advisory
Global vs block gem server source priority doesn't work as expected · Issue #3982 · rubygems/rubygems · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Exploit, Issue Tracking, Third Party Advisory
Bundler: A more secure bundler: We fixed our source priorities. af854a3a-2127-422b-91ae-364da2661108 bundler.io Vendor Advisory
[SECURITY] Fedora 34 Update: ruby-3.0.2-149.fc34 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 34 Update: ruby-3.0.2-149.fc34 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 159326 Oracle Enterprise Linux Security Update for ruby:2.7 (ELSA-2021-3020)
  • 159635 Oracle Enterprise Linux Security Update for ruby:2.6 (ELSA-2022-0543)
  • 159636 Oracle Enterprise Linux Security Update for ruby:2.5 (ELSA-2022-0545)
  • 239536 Red Hat Update for ruby:2.7 (RHSA-2021:3020)
  • 239644 Red Hat Update for rh-ruby27-ruby (RHSA-2021:3559)
  • 239651 Red Hat Update for rh-ruby27-ruby (RHSA-2021:3559)
  • 239736 Red Hat Update for rh-ruby30-ruby (RHSA-2021:3982)
  • 240086 Red Hat Update for ruby:2.5 (RHSA-2022:0545)
  • 240088 Red Hat Update for ruby:2.5 (RHSA-2022:0547)
  • 240090 Red Hat Update for ruby:2.6 (RHSA-2022:0544)
  • 240091 Red Hat Update for ruby:2.5 (RHSA-2022:0546)
  • 240092 Red Hat Update for ruby:2.6 (RHSA-2022:0543)
  • 240116 Red Hat Update for rh-ruby26-ruby security (RHSA-2022:0708)
  • 240156 Red Hat Update for ruby:2.6 (RHSA-2022:0582)
  • 240422 Red Hat Update for ruby:2.5 (RHSA-2022:0548)
  • 281749 Fedora Security Update for ruby (FEDORA-2021-36cdab1f8d)
  • 377094 Alibaba Cloud Linux Security Update for ruby:2.7 (ALINUX3-SA-2021:0054)
  • 940383 AlmaLinux Security Update for ruby:2.7 (ALSA-2021:3020)
  • 940455 AlmaLinux Security Update for ruby:2.6 (ALSA-2022:0543)
  • 940456 AlmaLinux Security Update for ruby:2.5 (ALSA-2022:0545)
  • 960315 Rocky Linux Security Update for ruby:2.7 (RLSA-2021:3020)
  • 960771 Rocky Linux Security Update for ruby:2.5 (RLSA-2022:0545)
  • 960814 Rocky Linux Security Update for ruby:2.6 (RLSA-2022:0543)

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report