{"id":"CVE-2019-20920","aliases":["CLSA-2026-1773101681","CLSA-2026-1774743817","CLSA-2026-1774743830","CLSA-2026-1774743837","CLSA-2026-1774743840","CLSA-2026-1776991069","CLSA-2026-1786731948","DEBIAN-CVE-2019-20920","EUVD-2022-0789","GHSA-2cf5-4w76-r9qv","GHSA-39q2-94rc-95cp","GHSA-3cqr-58rm-57f8","GHSA-cj63-jhhr-wcxv","GHSA-cjmm-f4jc-qw8r","GHSA-g9r4-xpmj-mj65","GHSA-h8r8-wccr-v5f2","GHSA-q2c6-c6pm-g3gh","GHSA-q42p-pg8m-cqh6","RHSA-2020:5179","ROOT-APP-NPM-CVE-2019-20920","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","SNYK-JS-HANDLEBARS-534478","UBUNTU-CVE-2019-20920"],"status":"published","title":"Arbitrary Code Execution in handlebars","description":"Handlebars before 3.0.8 and 4.x before 4.5.3 is vulnerable to Arbitrary Code Execution. The lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript. This can be used to run arbitrary code on a server processing Handlebars templates or in a victim's browser (effectively serving as XSS).","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:L","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.03154,"percentile":0.88048,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1321","CWE-471","CWE-94"],"published":"2019-06-05T14:07:48Z","modified":"2026-10-26T13:21:31Z","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"],"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":"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":"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":"2.0.0-tuxcare.0"},{"fixed":"2.0.0-tuxcare.3"}]}],"versions":["2.0.0","2.0.0-tuxcare.1","2.0.0-tuxcare.2"],"bundled":3},{"source":"osv","ecosystem":"TuxCare:npm","package":"handlebars","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.3.0-tuxcare.0"},{"fixed":"1.3.0-tuxcare.3"}]}],"versions":["1.3.0","1.3.0-tuxcare.1","1.3.0-tuxcare.2"],"bundled":3},{"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":"h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before 3.0.8 and 4.x before 4.5.3 is vulnerable to Arbitrary Code Execution. The lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript. This can be used to run arbitrary code on a server processing Handlebars templates or in a victim's browser (effectively serving as XSS).","status":"published","published":"2020-09-30T12:30:56Z","modified":"2026-10-08T21:13:55.415Z","updated_at":"2026-11-02T14:20:17.431882Z"}],"euvd":[{"id":"EUVD-2022-0789","description":"Handlebars before 3.0.8 and 4.x before 4.5.3 is vulnerable to Arbitrary Code Execution. The lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript. This can be used to run arbitrary code on a server processing Handlebars templates or in a victim's browser (effectively serving as XSS).","status":"published","published":"2020-09-30T12:30:56Z","modified":"2026-10-08T21:13:55Z","updated_at":"2026-11-02T17:27:26.452288Z"}],"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-3cqr-58rm-57f8","title":"Arbitrary Code Execution in Handlebars","description":"Handlebars before 3.0.8 and 4.x before 4.5.3 is vulnerable to Arbitrary Code Execution. The lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript. This can be used to run arbitrary code on a server processing Handlebars templates or in a victim's browser (effectively serving as XSS).","status":"published","published":"2022-02-10T20:38:19Z","modified":"2023-11-29T20:34:33Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:L","level":"high"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T14:37:22.840002Z"},{"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-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-2019-20920","description":"Handlebars before 3.0.8 and 4.x before 4.5.3 is vulnerable to Arbitrary Code Execution. The lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript. This can be used to run arbitrary code on a server processing Handlebars templates or in a victim's browser (effectively serving as XSS).","status":"published","published":"2020-09-30T18:15:17.927Z","modified":"2026-10-08T22:16:54.603Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:L","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T14:05:47.558959Z"}],"osv":[{"id":"CVE-2019-20920","description":"Handlebars before 3.0.8 and 4.x before 4.5.3 is vulnerable to Arbitrary Code Execution. The lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript. This can be used to run arbitrary code on a server processing Handlebars templates or in a victim's browser (effectively serving as XSS).","status":"published","published":"2020-09-30T18:15:17.927Z","modified":"2026-10-24T10:30:28.950515041Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:L","level":"high"}],"updated_at":"2026-11-02T15:44:12.363788Z"},{"id":"DEBIAN-CVE-2019-20920","description":"Handlebars before 3.0.8 and 4.x before 4.5.3 is vulnerable to Arbitrary Code Execution. The lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript. This can be used to run arbitrary code on a server processing Handlebars templates or in a victim's browser (effectively serving as XSS).","status":"published","published":"2020-09-30T18:15:17.927Z","modified":"2026-10-09T09:47:22.444878156Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:L","level":"high"}],"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-3cqr-58rm-57f8","title":"Arbitrary Code Execution in Handlebars","description":"Handlebars before 3.0.8 and 4.x before 4.5.3 is vulnerable to Arbitrary Code Execution. The lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript. This can be used to run arbitrary code on a server processing Handlebars templates or in a victim's browser (effectively serving as XSS).","status":"published","published":"2022-02-10T20:38:19Z","modified":"2026-09-10T03:49:16.886485583Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:L","level":"high"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T15:46:35.406455Z"},{"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":"RHSA-2020:5179","title":"Red Hat Security Advisory: Red Hat Virtualization security, bug fix, and enhancement update","status":"published","published":"2024-09-14T00:41:25Z","modified":"2026-10-13T10:01:57Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:L","level":"high"}],"updated_at":"2026-11-02T15:53:07.57369Z"},{"id":"UBUNTU-CVE-2019-20920","description":"Handlebars before 3.0.8 and 4.x before 4.5.3 is vulnerable to Arbitrary Code Execution. The lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript. This can be used to run arbitrary code on a server processing Handlebars templates or in a victim's browser (effectively serving as XSS).","status":"published","published":"2020-09-30T18:15:00Z","modified":"2025-10-24T04:48:10Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:L","level":"high"}],"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-2026-1774743837","title":"TuxCare security update for handlebars (7 CVEs)","description":"TuxCare rebuilt handlebars to address 7 CVEs. Fixed in 2.0.0-tuxcare.3.","status":"published","published":"2026-08-04T14:52:16Z","modified":"2026-10-15T09:47:48.473951217Z","updated_at":"2026-11-02T15:43:43.621843Z"},{"id":"CLSA-2026-1774743840","title":"TuxCare security update for handlebars (6 CVEs)","description":"TuxCare rebuilt handlebars to address 6 CVEs. Fixed in 1.3.0-tuxcare.3.","status":"published","published":"2026-08-04T14:52:16Z","modified":"2026-10-15T09:47:48.721630553Z","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-2019-20920","title":"CVE-2019-20920 in handlebars - Patched by Root","description":"Root has patched CVE-2019-20920 in the handlebars package for Root:npm. Multiple fixed versions available.","status":"published","published":"2026-10-20T10:47:36Z","modified":"2026-10-20T11:15:37.546185028Z","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"}]}}