{"id":"UBUNTU-CVE-2019-19919","details":"Versions of handlebars prior to 4.3.0 are vulnerable to Prototype Pollution leading to Remote Code Execution. Templates may alter an Object's __proto__ and __defineGetter__ properties, which may allow an attacker to execute arbitrary code through crafted payloads.","modified":"2025-10-24T04:48:07Z","published":"2019-12-20T23:15:00Z","upstream":["CVE-2019-19919"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-19919"},{"type":"REPORT","url":"https://www.npmjs.com/advisories/1164"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-19919"}],"affected":[{"package":{"name":"node-handlebars","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/node-handlebars@3:4.0.10-5?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3:4.0.10-5"],"ecosystem_specific":{"binaries":[{"binary_version":"3:4.0.10-5","binary_name":"handlebars"},{"binary_name":"libjs-handlebars","binary_version":"3:4.0.10-5"},{"binary_name":"libjs-handlebars.runtime","binary_version":"3:4.0.10-5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-19919.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}