CVE-2018-1000076: Debian Linux

Critical severity, CVSS 9.8. EPSS: 2.9% 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 Improper Verification of Cryptographic Signature vulnerability in package.rb that can result in a mis-signed gem could be installed, as the tarball would contain multiple gem signatures.. This vulnerability appears to have been fixed in 2.7.6.

Affected products

• Debian Debian Linux: version 7.0 only
• 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.