CVE-2018-1000079: Rubygems

Medium severity, CVSS 5.5. EPSS: 2.8% chance of exploitation in the next 30 days.

RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier, prior to trunk revision 62422 contains a Directory Traversal vulnerability in gem installation that can result in the gem could write to arbitrary filesystem locations during installation. This attack appear to be exploitable via the victim must install a malicious gem. This vulnerability appears to have been fixed in 2.7.6.

Affected products

• Rubygems Rubygems: up to and including 2.2.9; up to and including 2.3.6; up to and including 2.4.3; up to and including 2.5.0

Published 2018-03-13. Last modified 2026-06-17.