{"id":"CVE-2019-19919","aliases":["CLSA-2026-1773101681","CLSA-2026-1774743817","CLSA-2026-1774743830","CLSA-2026-1774743831","CLSA-2026-1774743832","CLSA-2026-1776991069","CLSA-2026-1786731948","DEBIAN-CVE-2019-19919","EUVD-2019-0803","GHSA-2cf5-4w76-r9qv","GHSA-39q2-94rc-95cp","GHSA-cj63-jhhr-wcxv","GHSA-cjmm-f4jc-qw8r","GHSA-g9r4-xpmj-mj65","GHSA-h8r8-wccr-v5f2","GHSA-q2c6-c6pm-g3gh","GHSA-q42p-pg8m-cqh6","GHSA-w457-6q6x-cgp9","ROOT-APP-NPM-CVE-2019-19919","ROOT-APP-NPM-GHSA-2cf5-4w76-r9qv","ROOT-APP-NPM-GHSA-g9r4-xpmj-mj65","ROOT-APP-NPM-GHSA-q2c6-c6pm-g3gh","ROOT-APP-NPM-GHSA-q42p-pg8m-cqh6","UBUNTU-CVE-2019-19919"],"status":"published","title":"Arbitrary Code Execution in handlebars","description":"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.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.07066,"percentile":0.94252,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-1321","CWE-471","CWE-74","CWE-94"],"published":"2019-06-05T14:07:48Z","modified":"2026-10-26T13:21:31Z","exploits":[{"source":"pocgithub","id":"fazilbaig1/CVE-2019-19919","title":"fazilbaig1/CVE-2019-19919","date":"2024-10-19","url":"https://github.com/fazilbaig1/CVE-2019-19919"}],"fixes":[{"ecosystem":"npm","package":"handlebars","fixed_in":["3.0.8","4.5.2","4.5.3","4.1.2","4.0.14","3.0.7","4.3.0"],"sources":["ghsa","osv"]},{"ecosystem":"TuxCare:npm","package":"handlebars","fixed_in":["1.3.0-tuxcare.1","1.0.12-tuxcare.2"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"node-handlebars","fixed_in":["3:4.5.3-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"node-handlebars","fixed_in":["3:4.5.3-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"node-handlebars","fixed_in":["3:4.5.3-1"],"sources":["osv"]},{"ecosystem":"Root:npm","package":"handlebars","fixed_in":["3.0.7-aikido.3","3.0.3-aikido.2","3.0.8-aikido.1","3.0.8-aikido.2","3.0.7-aikido.1","3.0.7-aikido.2"],"sources":["osv"]},{"ecosystem":"Root:npm","package":"@rootio/handlebars","fixed_in":["3.0.7-root.io.3","3.0.3-root.io.2","3.0.8-root.io.1","3.0.8-root.io.2","3.0.7-root.io.1","3.0.7-root.io.2"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.8"}]}]},{"source":"ghsa","ecosystem":"npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.5.2"}]}]},{"source":"ghsa","ecosystem":"npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.8"}]}]},{"source":"ghsa","ecosystem":"npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.5.3"}]}]},{"source":"ghsa","ecosystem":"npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.8"}]}]},{"source":"ghsa","ecosystem":"npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.5.3"}]}]},{"source":"ghsa","ecosystem":"npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.1.0"},{"fixed":"4.1.2"}]}]},{"source":"ghsa","ecosystem":"npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.0.14"}]}]},{"source":"ghsa","ecosystem":"npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.7"}]}]},{"source":"ghsa","ecosystem":"npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.3.0"}]}]},{"source":"ghsa","ecosystem":"RubyGems","package":"bootstrap-wysihtml5-rails","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.3.3.5"},{"last_affected":"0.3.3.8"}]}]},{"source":"ghsa","ecosystem":"npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.8"}]}]},{"source":"osv","ecosystem":"TuxCare:npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.3-tuxcare.0"},{"fixed":"3.0.3-tuxcare.1"}]}],"versions":["3.0.3"],"bundled":5},{"source":"osv","ecosystem":"TuxCare:npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.3.0-tuxcare.0"},{"fixed":"1.3.0-tuxcare.1"}]}],"versions":["1.3.0"]},{"source":"osv","ecosystem":"TuxCare:npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0.12-tuxcare.0"},{"fixed":"1.0.12-tuxcare.2"}]}],"versions":["1.0.12","1.0.12-tuxcare.1"]},{"source":"osv","ecosystem":"TuxCare:npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.3.0-tuxcare.0"},{"fixed":"1.3.0-tuxcare.2"}]}],"versions":["1.3.0","1.3.0-tuxcare.1"],"bundled":2},{"source":"osv","ecosystem":"TuxCare:npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0-tuxcare.0"},{"fixed":"2.0.0-tuxcare.2"}]}],"versions":["2.0.0","2.0.0-tuxcare.1"],"bundled":2},{"source":"osv","ecosystem":"TuxCare:npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.9-tuxcare.0"},{"fixed":"4.7.9-tuxcare.1"}]}],"versions":["4.7.9"],"bundled":5},{"source":"osv","ecosystem":"Debian:12","package":"node-handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3:4.5.3-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"node-handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3:4.5.3-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"node-handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3:4.5.3-1"}]}]},{"source":"osv","ecosystem":"npm","package":"handlebars","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.0.8"}]}]},{"source":"osv","ecosystem":"npm","package":"handlebars","ranges":[{"type":"SEMVER","events":[{"introduced":"4.0.0"},{"fixed":"4.5.2"}]}]},{"source":"osv","ecosystem":"npm","package":"handlebars","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.0.8"}]}]},{"source":"osv","ecosystem":"npm","package":"handlebars","ranges":[{"type":"SEMVER","events":[{"introduced":"4.0.0"},{"fixed":"4.5.3"}]}]},{"source":"osv","ecosystem":"npm","package":"handlebars","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.0.8"}]}]},{"source":"osv","ecosystem":"npm","package":"handlebars","ranges":[{"type":"SEMVER","events":[{"introduced":"4.0.0"},{"fixed":"4.5.3"}]}]},{"source":"osv","ecosystem":"npm","package":"handlebars","ranges":[{"type":"SEMVER","events":[{"introduced":"4.1.0"},{"fixed":"4.1.2"}]}]},{"source":"osv","ecosystem":"npm","package":"handlebars","ranges":[{"type":"SEMVER","events":[{"introduced":"4.0.0"},{"fixed":"4.0.14"}]}]},{"source":"osv","ecosystem":"npm","package":"handlebars","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.0.7"}]}]},{"source":"osv","ecosystem":"npm","package":"handlebars","ranges":[{"type":"SEMVER","events":[{"introduced":"4.0.0"},{"fixed":"4.3.0"}]}]},{"source":"osv","ecosystem":"RubyGems","package":"bootstrap-wysihtml5-rails","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.3.3.5"},{"last_affected":"0.3.3.8"}]}],"versions":["0.3.3.5","0.3.3.6","0.3.3.7","0.3.3.8"]},{"source":"osv","ecosystem":"npm","package":"handlebars","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.0.8"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.7-aikido.3"},{"fixed":"3.0.3-aikido.2"},{"fixed":"3.0.8-aikido.1"},{"fixed":"3.0.8-aikido.2"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@rootio/handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.7-root.io.3"},{"fixed":"3.0.3-root.io.2"},{"fixed":"3.0.8-root.io.1"},{"fixed":"3.0.8-root.io.2"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.7-aikido.3"},{"fixed":"3.0.3-aikido.2"},{"fixed":"3.0.8-aikido.1"},{"fixed":"3.0.8-aikido.2"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@rootio/handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.7-root.io.3"},{"fixed":"3.0.3-root.io.2"},{"fixed":"3.0.8-root.io.1"},{"fixed":"3.0.8-root.io.2"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.7-aikido.3"},{"fixed":"3.0.3-aikido.2"},{"fixed":"3.0.8-aikido.1"},{"fixed":"3.0.8-aikido.2"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@rootio/handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.7-root.io.3"},{"fixed":"3.0.3-root.io.2"},{"fixed":"3.0.8-root.io.1"},{"fixed":"3.0.8-root.io.2"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.7-aikido.3"},{"fixed":"3.0.3-aikido.2"},{"fixed":"3.0.8-aikido.1"},{"fixed":"3.0.8-aikido.2"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@rootio/handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.7-root.io.3"},{"fixed":"3.0.3-root.io.2"},{"fixed":"3.0.8-root.io.1"},{"fixed":"3.0.8-root.io.2"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.3-aikido.2"},{"fixed":"3.0.7-aikido.1"},{"fixed":"3.0.7-aikido.2"},{"fixed":"3.0.7-aikido.3"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@rootio/handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.3-root.io.2"},{"fixed":"3.0.7-root.io.1"},{"fixed":"3.0.7-root.io.2"},{"fixed":"3.0.7-root.io.3"}]}]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"node-handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3:4.0.10-5"]}],"products":[{"vendor":"handlebars.js_project","product":"handlebars.js"},{"vendor":"tenable","product":"tenable.sc"}],"references":[{"url":"https://www.npmjs.com/advisories/1164","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory","report"]},{"url":"https://www.tenable.com/security/tns-2021-14","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://www.npmjs.com/advisories/1316","tags":["web"]},{"url":"https://github.com/advisories/GHSA-2cf5-4w76-r9qv"},{"url":"https://www.npmjs.com/advisories/1325","tags":["web"]},{"url":"https://github.com/advisories/GHSA-g9r4-xpmj-mj65"},{"url":"https://www.npmjs.com/advisories/1324","tags":["web"]},{"url":"https://github.com/advisories/GHSA-q2c6-c6pm-g3gh"},{"url":"https://github.com/handlebars-lang/handlebars.js/issues/1495","tags":["web"]},{"url":"https://github.com/handlebars-lang/handlebars.js/commit/7372d4e9dffc9d70c09671aa28b9392a1577fd86","tags":["web"]},{"url":"https://snyk.io/vuln/SNYK-JS-HANDLEBARS-173692","tags":["web"]},{"url":"https://www.npmjs.com/advisories/755","tags":["web"]},{"url":"https://github.com/handlebars-lang/handlebars.js/commit/0d6d8c335ad81bad1b672fc56b6a44f6aa472dac","tags":["web"]},{"url":"https://github.com/handlebars-lang/handlebars.js/commit/85c8783b34fc6d36145d8b53885ad0b9e3c3f9c4","tags":["web"]},{"url":"https://github.com/handlebars-lang/handlebars.js/commit/cd38583216dce3252831916323202749431c773e","tags":["web"]},{"url":"https://github.com/advisories/GHSA-q42p-pg8m-cqh6"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-19919","tags":["advisory"]},{"url":"https://github.com/wycats/handlebars.js/issues/1558","tags":["web"]},{"url":"https://github.com/wycats/handlebars.js/commit/2078c727c627f25d4a149962f05c1e069beb18bc","tags":["web"]},{"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19919","tags":["web"]},{"url":"https://github.com/handlebars-lang/handlebars.js/commit/156061eb7707575293613d7fdf90e2bdaac029ee","tags":["web"]},{"url":"https://github.com/handlebars-lang/handlebars.js/commit/90ad8d97ad2933852fb83fcc054699dc99e094db","tags":["web"]},{"url":"https://github.com/Nerian/bootstrap-wysihtml5-rails/blob/master/vendor/assets/javascripts/bootstrap-wysihtml5/handlebars.runtime.min.js","tags":["web"]},{"url":"https://github.com/Nerian/bootstrap-wysihtml5-rails/tree/master/vendor/assets/javascripts/bootstrap-wysihtml5","tags":["web"]},{"url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/bootstrap-wysihtml5-rails/CVE-2019-19919.yml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-w457-6q6x-cgp9"},{"url":"https://security-tracker.debian.org/tracker/CVE-2019-19919","tags":["advisory"]},{"url":"https://github.com/wycats/handlebars.js","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2019-19919","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-19919","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2019-19919","description":"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.","status":"published","published":"2019-12-20T22:50:39Z","modified":"2024-08-05T02:32:09.526Z","updated_at":"2026-11-02T14:20:21.059499Z"}],"euvd":[{"id":"EUVD-2019-0803","description":"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.","status":"published","published":"2019-12-20T22:50:39Z","modified":"2024-08-05T02:32:09Z","updated_at":"2026-11-03T02:40:23.78072Z"}],"ghsa":[{"id":"GHSA-2cf5-4w76-r9qv","title":"Arbitrary Code Execution in handlebars","description":"Versions of `handlebars` prior to 3.0.8 or 4.5.2 are vulnerable to Arbitrary Code Execution. The package's lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript in the system. It can be used to run arbitrary code in a server processing Handlebars templates or on a victim's browser (effectively serving as Cross-Site Scripting).\n\nThe following template can be used to demonstrate the vulnerability:  \n```{{#with \"constructor\"}}\n\t{{#with split as |a|}}\n\t\t{{pop (push \"alert('Vulnerable Handlebars JS');\")}}\n\t\t{{#with (concat (lookup join (slice 0 1)))}}\n\t\t\t{{#each (slice 2 3)}}\n\t\t\t\t{{#with (apply 0 a)}}\n\t\t\t\t\t{{.}}\n\t\t\t\t{{/with}}\n\t\t\t{{/each}}\n\t\t{{/with}}\n\t{{/with}}\n{{/with}}```\n\n\n## Recommendation\n\nUpgrade to version 3.0.8, 4.5.2 or later.","status":"published","published":"2020-09-04T14:57:38Z","modified":"2024-02-07T05:08:28Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:L","level":"high"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T14:37:36.076201Z"},{"id":"GHSA-q42p-pg8m-cqh6","title":"Prototype Pollution in handlebars","description":"Versions of `handlebars` prior to 4.0.14 are vulnerable to Prototype Pollution. Templates may alter an Objects' prototype, thus allowing an attacker to execute arbitrary code on the server.\n\n\n## Recommendation\n\nFor handlebars 4.1.x upgrade to 4.1.2 or later.\nFor handlebars 4.0.x upgrade to 4.0.14 or later.","status":"published","published":"2019-06-05T14:07:48Z","modified":"2023-11-29T20:32:55Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high"}],"cwes":["CWE-471"],"updated_at":"2026-11-02T14:37:22.840002Z"},{"id":"GHSA-w457-6q6x-cgp9","title":"Prototype Pollution in handlebars","description":"Versions of `handlebars` prior to 3.0.8 or 4.3.0 are vulnerable to Prototype Pollution leading to Remote Code Execution. Templates may alter an Objects' `__proto__` and `__defineGetter__` properties, which may allow an attacker to execute arbitrary code through crafted payloads.\n\n\n## Recommendation\n\nUpgrade to version 3.0.8, 4.3.0 or later.","status":"published","published":"2019-12-26T17:58:13Z","modified":"2025-02-12T05:08:52Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-74","CWE-1321"],"updated_at":"2026-11-02T14:38:30.754382Z"},{"id":"GHSA-g9r4-xpmj-mj65","title":"Prototype Pollution in handlebars","description":"Versions of `handlebars` prior to 3.0.8 or 4.5.3 are vulnerable to prototype pollution. It is possible to add or modify properties to the Object prototype through a malicious template. This may allow attackers to crash the application or execute Arbitrary Code in specific conditions.\n\n\n## Recommendation\n\nUpgrade to version 3.0.8, 4.5.3 or later.","status":"published","published":"2020-09-04T15:06:32Z","modified":"2023-01-09T05:04:02Z","cwes":["CWE-1321"],"updated_at":"2026-11-02T14:36:08.267721Z"},{"id":"GHSA-q2c6-c6pm-g3gh","title":"Arbitrary Code Execution in handlebars","description":"Versions of `handlebars` prior to 3.0.8 or 4.5.3 are vulnerable to Arbitrary Code Execution. The package's lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript in the system. It is due to an incomplete fix for a [previous issue](https://www.npmjs.com/advisories/1316). This vulnerability can be used to run arbitrary code in a server processing Handlebars templates or on a victim's browser (effectively serving as Cross-Site Scripting).\n\n\n## Recommendation\n\nUpgrade to version 3.0.8, 4.5.3 or later.","status":"published","published":"2020-09-04T15:07:38Z","modified":"2023-01-09T05:04:24Z","updated_at":"2026-11-02T14:36:09.554044Z"}],"nvd":[{"id":"CVE-2019-19919","description":"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.","status":"published","published":"2019-12-20T23:15:11.48Z","modified":"2026-06-17T02:27:27.147Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:05:40.856496Z"}],"osv":[{"id":"CVE-2019-19919","description":"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.","status":"published","published":"2019-12-20T23:15:11.48Z","modified":"2026-10-24T10:31:02.781723518Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:12.010761Z"},{"id":"DEBIAN-CVE-2019-19919","description":"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.","status":"published","published":"2019-12-20T23:15:11.48Z","modified":"2026-09-21T07:02:33.203308441Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:32.221385Z"},{"id":"GHSA-2cf5-4w76-r9qv","title":"Arbitrary Code Execution in handlebars","description":"Versions of `handlebars` prior to 3.0.8 or 4.5.2 are vulnerable to Arbitrary Code Execution. The package's lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript in the system. It can be used to run arbitrary code in a server processing Handlebars templates or on a victim's browser (effectively serving as Cross-Site Scripting).\n\nThe following template can be used to demonstrate the vulnerability:  \n```{{#with \"constructor\"}}\n\t{{#with split as |a|}}\n\t\t{{pop (push \"alert('Vulnerable Handlebars JS');\")}}\n\t\t{{#with (concat (lookup join (slice 0 1)))}}\n\t\t\t{{#each (slice 2 3)}}\n\t\t\t\t{{#with (apply 0 a)}}\n\t\t\t\t\t{{.}}\n\t\t\t\t{{/with}}\n\t\t\t{{/each}}\n\t\t{{/with}}\n\t{{/with}}\n{{/with}}```\n\n\n## Recommendation\n\nUpgrade to version 3.0.8, 4.5.2 or later.","status":"published","published":"2020-09-04T14:57:38Z","modified":"2026-09-10T03:48:33.174881747Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:L","level":"high"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T15:46:34.338541Z"},{"id":"GHSA-q42p-pg8m-cqh6","title":"Prototype Pollution in handlebars","description":"Versions of `handlebars` prior to 4.0.14 are vulnerable to Prototype Pollution. Templates may alter an Objects' prototype, thus allowing an attacker to execute arbitrary code on the server.\n\n\n## Recommendation\n\nFor handlebars 4.1.x upgrade to 4.1.2 or later.\nFor handlebars 4.0.x upgrade to 4.0.14 or later.","status":"published","published":"2019-06-05T14:07:48Z","modified":"2026-09-10T03:48:23.648231681Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high"}],"cwes":["CWE-471"],"updated_at":"2026-11-02T15:46:54.055966Z"},{"id":"GHSA-w457-6q6x-cgp9","title":"Prototype Pollution in handlebars","description":"Versions of `handlebars` prior to 3.0.8 or 4.3.0 are vulnerable to Prototype Pollution leading to Remote Code Execution. Templates may alter an Objects' `__proto__` and `__defineGetter__` properties, which may allow an attacker to execute arbitrary code through crafted payloads.\n\n\n## Recommendation\n\nUpgrade to version 3.0.8, 4.3.0 or later.","status":"published","published":"2019-12-26T17:58:13Z","modified":"2026-09-10T03:49:25.089815783Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-1321","CWE-74"],"updated_at":"2026-11-02T15:46:58.04805Z"},{"id":"UBUNTU-CVE-2019-19919","description":"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.","status":"published","published":"2019-12-20T23:15:00Z","modified":"2025-10-24T04:48:07Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:54:21.213407Z"},{"id":"CLSA-2026-1773101681","title":"TuxCare security update for handlebars (9 CVEs)","description":"TuxCare rebuilt handlebars to address 9 CVEs. Fixed in 3.0.3-tuxcare.1.","status":"published","published":"2026-08-04T14:52:11Z","modified":"2026-10-15T09:45:26.324830766Z","updated_at":"2026-11-02T15:43:43.249928Z"},{"id":"CLSA-2026-1774743817","title":"TuxCare security update for handlebars (1 CVE)","description":"TuxCare rebuilt handlebars to address 1 CVE. Fixed in 1.3.0-tuxcare.1.","status":"published","published":"2026-08-04T14:52:15Z","modified":"2026-10-15T09:47:48.668758728Z","updated_at":"2026-11-02T15:43:43.621843Z"},{"id":"CLSA-2026-1774743830","title":"TuxCare security update for handlebars (3 CVEs)","description":"TuxCare rebuilt handlebars to address 3 CVEs. Fixed in 1.0.12-tuxcare.2.","status":"published","published":"2026-08-04T14:52:16Z","modified":"2026-10-23T19:28:13.663406058Z","updated_at":"2026-11-02T15:43:43.621843Z"},{"id":"CLSA-2026-1774743831","title":"TuxCare security update for handlebars (2 CVEs)","description":"TuxCare rebuilt handlebars to address 2 CVEs. Fixed in 1.3.0-tuxcare.2.","status":"published","published":"2026-08-04T14:52:16Z","modified":"2026-10-15T09:47:48.603282866Z","updated_at":"2026-11-02T15:43:43.621843Z"},{"id":"CLSA-2026-1774743832","title":"TuxCare security update for handlebars (2 CVEs)","description":"TuxCare rebuilt handlebars to address 2 CVEs. Fixed in 2.0.0-tuxcare.2.","status":"published","published":"2026-08-04T14:52:16Z","modified":"2026-10-15T09:47:48.741949932Z","updated_at":"2026-11-02T15:43:43.621843Z"},{"id":"CLSA-2026-1776991069","title":"TuxCare security update for handlebars (9 CVEs)","description":"TuxCare rebuilt handlebars to address 9 CVEs. Fixed in 4.7.9-tuxcare.1.","status":"published","published":"2026-08-04T14:52:28Z","modified":"2026-10-15T09:47:50.026036318Z","updated_at":"2026-11-02T15:43:44.384419Z"},{"id":"CLSA-2026-1786731948","title":"TuxCare security update for dompurify (34 CVEs)","description":"TuxCare rebuilt dompurify to address 34 CVEs. Fixed in 3.0.3-tuxcare.1.","status":"withdrawn","published":"2026-08-14T18:25:48Z","modified":"2026-10-26T13:21:31Z","updated_at":"2026-11-02T15:43:47.20725Z"},{"id":"GHSA-g9r4-xpmj-mj65","title":"Prototype Pollution in handlebars","description":"Versions of `handlebars` prior to 3.0.8 or 4.5.3 are vulnerable to prototype pollution. It is possible to add or modify properties to the Object prototype through a malicious template. This may allow attackers to crash the application or execute Arbitrary Code in specific conditions.\n\n\n## Recommendation\n\nUpgrade to version 3.0.8, 4.5.3 or later.","status":"published","published":"2020-09-04T15:06:32Z","modified":"2026-09-10T03:49:13.649783342Z","cwes":["CWE-1321"],"updated_at":"2026-11-02T15:46:47.472172Z"},{"id":"GHSA-q2c6-c6pm-g3gh","title":"Arbitrary Code Execution in handlebars","description":"Versions of `handlebars` prior to 3.0.8 or 4.5.3 are vulnerable to Arbitrary Code Execution. The package's lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript in the system. It is due to an incomplete fix for a [previous issue](https://www.npmjs.com/advisories/1316). This vulnerability can be used to run arbitrary code in a server processing Handlebars templates or on a victim's browser (effectively serving as Cross-Site Scripting).\n\n\n## Recommendation\n\nUpgrade to version 3.0.8, 4.5.3 or later.","status":"published","published":"2020-09-04T15:07:38Z","modified":"2026-09-10T03:48:58.277710865Z","updated_at":"2026-11-02T15:46:53.700556Z"},{"id":"ROOT-APP-NPM-CVE-2019-19919","title":"CVE-2019-19919 in handlebars - Patched by Root","description":"Root has patched CVE-2019-19919 in the handlebars package for Root:npm. Multiple fixed versions available.","status":"published","published":"2026-10-20T10:47:36Z","modified":"2026-10-20T11:15:37.544125445Z","updated_at":"2026-11-02T15:53:27.362922Z"},{"id":"ROOT-APP-NPM-GHSA-2cf5-4w76-r9qv","title":"GHSA-2cf5-4w76-r9qv in handlebars - Patched by Root","description":"Root has patched GHSA-2cf5-4w76-r9qv in the handlebars package for Root:npm. Multiple fixed versions available.","status":"published","published":"2026-10-20T10:47:36Z","modified":"2026-10-20T11:15:38.540557189Z","updated_at":"2026-11-02T15:53:27.940619Z"},{"id":"ROOT-APP-NPM-GHSA-g9r4-xpmj-mj65","title":"GHSA-g9r4-xpmj-mj65 in handlebars - Patched by Root","description":"Root has patched GHSA-g9r4-xpmj-mj65 in the handlebars package for Root:npm. Multiple fixed versions available.","status":"published","published":"2026-10-20T10:47:36Z","modified":"2026-10-20T11:15:39.391242933Z","updated_at":"2026-11-02T15:53:27.940619Z"},{"id":"ROOT-APP-NPM-GHSA-q2c6-c6pm-g3gh","title":"GHSA-q2c6-c6pm-g3gh in handlebars - Patched by Root","description":"Root has patched GHSA-q2c6-c6pm-g3gh in the handlebars package for Root:npm. Multiple fixed versions available.","status":"published","published":"2026-10-20T10:47:36Z","modified":"2026-10-20T11:15:37.928892011Z","updated_at":"2026-11-02T15:53:27.940619Z"},{"id":"ROOT-APP-NPM-GHSA-q42p-pg8m-cqh6","title":"GHSA-q42p-pg8m-cqh6 in handlebars - Patched by Root","description":"Root has patched GHSA-q42p-pg8m-cqh6 in the handlebars package for Root:npm. Multiple fixed versions available.","status":"published","published":"2026-10-20T10:47:36Z","modified":"2026-10-20T11:15:37.540463486Z","updated_at":"2026-11-02T15:53:27.940619Z"}]}}