CVE-2020-36327 — Dependency Confusion in bundler — CVE Details

HIGH

Dependency Confusion in Bundler

Published May 24, 2021Updated December 5, 2024Source: osv

Summary

Bundler 1.16.0 through 2.2.9 and 2.2.11 through 2.2.17 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.

Advisory Timeline

First published May 24, 2021 (1967 days ago).
Last revised December 5, 2024 — 1290 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler

Update bundler to 2.2.10 or later

gem install bundler -v 2.2.10

Bundler

Update bundler to 2.2.18 or later

gem install bundler -v 2.2.18

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (2)

Affects 1 ecosystem: rubygems (1).

Package	Ecosystem	Affected	Fixed In
bundler	rubygems	1.16.0, 1.16.1, 1.16.2, 1.16.3 (+35 more)	2.2.10
bundler	rubygems	2.2.11, 2.2.12, 2.2.13, 2.2.14 (+3 more)	2.2.18

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 8.8 score means for each attack dimension.

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

References

Frequently Asked Questions

What is CVE-2020-36327?: Dependency Confusion in Bundler This vulnerability has been assigned a severity rating of HIGH (CVSS score: 8.8/10).
How do I check if my project is affected by CVE-2020-36327?: CVE-2020-36327 affects bundler. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2020-36327 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

8.8

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-fp4w-jxhp-m23p

Related CVEs

CVE-2016-7954
CRITICAL
Bundler allows attacker to inject arbitrary code via secondary Gem source
CVE-2026-94462
HIGH
Spree: Broken Access Control in `PATCH /api/v3/store/carts/:id/associate` (IDOR)
CVE-2019-3881
HIGH
Insecure path handling in Bundler
CVE-2026-77601
HIGH
OpenC3 COSMOS: Authenticated OS command injection via the `pypi_url` setting
CVE-2021-43809
MEDIUM
Local Code Execution through Argument Injection via dash leading git url parameter in Gemfile.

More RubyGems advisories

Check if you're affected

Scan your dependencies to see if this vulnerability affects your projects.

Scan Your Dependencies