{"id":"CVE-2018-3740","aliases":["GHSA-7f42-p84j-f58p"],"url":"https://o3.security/vulnerability/CVE-2018-3740","summary":"Sanitize vulnerable to Improper Input Validation and Cross-site Scripting","details":"When Sanitize <= 4.6.2 is used in combination with libxml2 >= 2.9.2, a specially crafted HTML fragment can cause libxml2 to generate improperly escaped output, allowing non-whitelisted attributes to be used on whitelisted elements.\n\nThis can allow HTML and JavaScript injection, which could result in XSS if Sanitize's output is served to browsers.","published":"2018-03-30T19:29:00.270Z","modified":"2026-10-20T10:50:27.807921225Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"RubyGems","name":"sanitize","fixedVersion":"4.6.3"}],"fix":{"url":"https://github.com/rgrove/sanitize/commit/01629a162e448a83d901456d0ba8b65f3b03d46e","label":"rgrove/sanitize@01629a1"},"references":[{"type":"WEB","url":"https://about.gitlab.com/2018/06/25/security-release-gitlab-11-dot-0-dot-1-released/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2018/dsa-4358"},{"type":"REPORT","url":"https://github.com/rgrove/sanitize/issues/176"},{"type":"FIX","url":"https://github.com/rgrove/sanitize/commit/01629a162e448a83d901456d0ba8b65f3b03d46e"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2018-3740"},{"type":"WEB","url":"https://github.com/rgrove/sanitize/commit/93feeb38e21864146bb29191792b971dbe1ec62e"},{"type":"WEB","url":"https://about.gitlab.com/2018/06/25/security-release-gitlab-11-dot-0-dot-1-released"},{"type":"PACKAGE","url":"https://github.com/rgrove/sanitize"},{"type":"WEB","url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/sanitize/CVE-2018-3740.yml"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-20T10:50:27.807921225Z"}}