{"action":"Upgrade jruby to 1.7.20.1-2 or later.","affected":[{"fixed":"1.7.20.1-2","introduced":"0"}],"component":"jruby","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1.7.20.1-2"],"id":"tcs_01M5NB79Q97860WFDC7MPYN8S7","modified_at":"2026-09-09T06:47:20.353708626Z","published_at":"2015-06-24T14:59:01.190Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2015-3900","https://security-tracker.debian.org/tracker/CVE-2015-3900"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2015-3900#Debian:14/jruby","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2015-3900"}],"summary":"RubyGems 2.0.x before 2.0.16, 2.2.x before 2.2.4, and 2.4.x before 2.4.7 does not validate the hostname when fetching gems or making API requests, which allows remote attackers to redirect requests to"}