{"id":"CVE-2018-1000076","aliases":["GHSA-mc6j-h948-v2p6"],"url":"https://o3.security/vulnerability/CVE-2018-1000076","summary":"RubyGems Improper Verification of Cryptographic Signature vulnerability","details":"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.","published":"2018-03-13T15:29:00.613Z","modified":"2026-08-27T03:47:23.251725580Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.jruby:jruby-stdlib","fixedVersion":"9.1.16.0"},{"ecosystem":"RubyGems","name":"rubygems-update","fixedVersion":"2.7.6"}],"fix":{"url":"https://github.com/rubygems/rubygems/commit/f5042b879259b1f1ce95a0c5082622c646376693","label":"rubygems/rubygems@f5042b8"},"references":[{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2018/04/msg00023.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2019/05/msg00028.html"},{"type":"WEB","url":"https://usn.ubuntu.com/3621-1/"},{"type":"ADVISORY","url":"http://blog.rubygems.org/2018/02/15/2.7.6-released.html"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:3729"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:3730"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:3731"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:2028"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2020:0542"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2020:0591"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2020:0663"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2018/04/msg00000.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2018/04/msg00001.html"},{"type":"ADVISORY","url":"https://www.debian.org/security/2018/dsa-4219"},{"type":"ADVISORY","url":"https://www.debian.org/security/2018/dsa-4259"},{"type":"FIX","url":"https://github.com/rubygems/rubygems/commit/f5042b879259b1f1ce95a0c5082622c646376693"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-27T03:47:23.251725580Z"}}