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CVE WatchOct 8, 2026

CVE-2020-36327

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

CVSS

8.8

High

EPSS

6.3%

p94

KEV

—

Exploit Today

28

0-100

Published: Apr 29, 2021 · Last modified: Oct 8, 2026

EPSS · 30d
6.3%EPSS · 30 days6.3%
2026-10-042026-11-01
Technical 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.

Official references
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