{"id":"CVE-2026-66010","aliases":["CLSA-2026-1774743817","CLSA-2026-1774743830","CLSA-2026-1784769611","CLSA-2026-1784856216","CLSA-2026-1786539981","CLSA-2026-1786636600","CLSA-2026-1786636613","CLSA-2026-1786636721","CLSA-2026-1786731853","CLSA-2026-1786731948","CLSA-2026-1786731971","CLSA-2026-1789152222","CLSA-2026-1789153936","CLSA-2026-1789154068","CLSA-2026-1789154458","CLSA-2026-1789155659","CLSA-2026-1789400953","CLSA-2026-1789404783","CLSA-2026-1791798931","CLSA-2026-1791806751","CLSA-2026-1791815045","CLSA-2026-1791821569","CLSA-2026-1791825656","CLSA-2026-1791849797","CLSA-2026-1792155851","CLSA-2026-1792156267","CLSA-2026-1792156282","CLSA-2026-1792156382","CLSA-2026-1792156589","CLSA-2026-1792156694","CLSA-2026-1792156909","CLSA-2026-1792157013","CLSA-2026-1792157113","CLSA-2026-1792161408","CLSA-2026-1792161492","CLSA-2026-1792163693","CLSA-2026-1792424561","CLSA-2026-1792424891","CLSA-2026-1792453557","CLSA-2026-1792479087","CLSA-2026-1792933945","DEBIAN-CVE-2026-66010","EUVD-2026-48582","GHSA-2cf5-4w76-r9qv","GHSA-39q2-94rc-95cp","GHSA-55q2-fjhq-7xh7","GHSA-6688-9rhm-gjv2","GHSA-c2j3-45gr-mqc4","GHSA-c6gr-qvv4-5v3f","GHSA-cj63-jhhr-wcxv","GHSA-cjmm-f4jc-qw8r","GHSA-g9r4-xpmj-mj65","GHSA-h8r8-wccr-v5f2","GHSA-jxrp-r7gx-q4j8","GHSA-q2c6-c6pm-g3gh","GHSA-q42p-pg8m-cqh6","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-2026-66010"],"status":"published","title":"DOMPurify before 3.4.12 Hook Bypass via CUSTOM_ELEMENT_HANDLING","description":"DOMPurify before 3.4.12 fails to execute afterSanitizeElements hook for custom elements allowed via CUSTOM_ELEMENT_HANDLING.tagNameCheck, allowing attributes to bypass application security policies. Attackers can preserve sensitive attributes on custom elements that later re-inject them into innerHTML sinks, creating second-order XSS gadgets.","severity":{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00215,"percentile":0.11998,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1321","CWE-471","CWE-79","CWE-94"],"published":"2019-06-05T14:07:48Z","modified":"2026-10-28T02:31:01Z","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":"TuxCare:npm","package":"dompurify","fixed_in":["2.5.9-tuxcare.5","3.4.11-tuxcare.1","3.4.10-tuxcare.1","3.4.9-tuxcare.1","3.4.7-tuxcare.1","3.4.6-tuxcare.1","3.4.5-tuxcare.1","3.0.6-tuxcare.2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"node-dompurify","fixed_in":["3.4.12+dfsg-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":"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":"dompurify","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.5.9-tuxcare.0"},{"fixed":"2.5.9-tuxcare.5"}]}],"versions":["2.5.9","2.5.9-tuxcare.1","2.5.9-tuxcare.2","2.5.9-tuxcare.3","2.5.9-tuxcare.4"]},{"source":"osv","ecosystem":"TuxCare:npm","package":"dompurify","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.5.8-tuxcare.0"},{"fixed":"2.5.8-tuxcare.6"}]}],"versions":["2.5.8","2.5.8-tuxcare.1","2.5.8-tuxcare.2","2.5.8-tuxcare.3","2.5.8-tuxcare.4","2.5.8-tuxcare.5"],"bundled":2},{"source":"osv","ecosystem":"TuxCare:npm","package":"dompurify","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.2.3-tuxcare.0"},{"fixed":"3.2.3-tuxcare.3"}]}],"versions":["3.2.3","3.2.3-tuxcare.1","3.2.3-tuxcare.2"],"bundled":9},{"source":"osv","ecosystem":"TuxCare:npm","package":"dompurify","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.1.6-tuxcare.0"},{"fixed":"3.1.6-tuxcare.7"}]}],"versions":["3.1.6","3.1.6-tuxcare.1","3.1.6-tuxcare.2","3.1.6-tuxcare.3","3.1.6-tuxcare.4","3.1.6-tuxcare.5","3.1.6-tuxcare.6"],"bundled":6},{"source":"osv","ecosystem":"TuxCare:npm","package":"dompurify","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.3.0-tuxcare.0"},{"fixed":"2.3.0-tuxcare.5"}]}],"versions":["2.3.0","2.3.0-tuxcare.1","2.3.0-tuxcare.2","2.3.0-tuxcare.3","2.3.0-tuxcare.4"],"bundled":10},{"source":"osv","ecosystem":"TuxCare:npm","package":"dompurify","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0-tuxcare.0"},{"fixed":"2.4.0-tuxcare.5"}]}],"versions":["2.4.0","2.4.0-tuxcare.1","2.4.0-tuxcare.2","2.4.0-tuxcare.3","2.4.0-tuxcare.4"],"bundled":8},{"source":"osv","ecosystem":"TuxCare:npm","package":"dompurify","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.3-tuxcare.0"},{"fixed":"3.0.3-tuxcare.5"}]}],"versions":["3.0.3","3.0.3-tuxcare.1","3.0.3-tuxcare.2","3.0.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Advisory","advisory","web","report"]},{"url":"https://www.vulncheck.com/advisories/dompurify-before-hook-bypass-via-custom-element-handling","tags":["third-party-advisory","Third Party Advisory","advisory","web","report"]},{"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://nvd.nist.gov/vuln/detail/CVE-2026-66010","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-jxrp-r7gx-q4j8"},{"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://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66010.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-66010","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-66010","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-66010","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-66010","title":"DOMPurify before 3.4.12 Hook Bypass via CUSTOM_ELEMENT_HANDLING","description":"DOMPurify before 3.4.12 fails to execute afterSanitizeElements hook for custom elements allowed via CUSTOM_ELEMENT_HANDLING.tagNameCheck, allowing attributes to bypass application security policies. Attackers can preserve sensitive attributes on custom elements that later re-inject them into innerHTML sinks, creating second-order XSS gadgets.","status":"published","published":"2026-07-24T12:07:57.374Z","modified":"2026-09-17T17:54:37.884Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:20:12.939084Z"}],"euvd":[{"id":"EUVD-2026-48582","description":"DOMPurify before 3.4.12 fails to execute afterSanitizeElements hook for custom elements allowed via CUSTOM_ELEMENT_HANDLING.tagNameCheck, allowing attributes to bypass application security policies. Attackers can preserve sensitive attributes on custom elements that later re-inject them into innerHTML sinks, creating second-order XSS gadgets.","status":"published","published":"2026-07-24T12:07:57Z","modified":"2026-09-17T17:54:37Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"medium"}],"updated_at":"2026-11-02T17:28:10.833571Z"}],"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-jxrp-r7gx-q4j8","title":"Duplicate Advisory: DOMPurify: `CUSTOM_ELEMENT_HANDLING` bypasses `afterSanitizeElements` for allowed custom elements.","description":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-c2j3-45gr-mqc4. This link is maintained to preserve external references.\n\n## Original Description\n\nDOMPurify before 3.4.12 fails to execute afterSanitizeElements hook for custom elements allowed via CUSTOM_ELEMENT_HANDLING.tagNameCheck, allowing attributes to bypass application security policies. Attackers can preserve sensitive attributes on custom elements that later re-inject them into innerHTML sinks, creating second-order XSS gadgets.","status":"withdrawn","published":"2026-07-24T15:33:01Z","modified":"2026-10-02T22:43:13Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:41:24.739884Z"},{"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-2026-66010","description":"DOMPurify before 3.4.12 fails to execute afterSanitizeElements hook for custom elements allowed via CUSTOM_ELEMENT_HANDLING.tagNameCheck, allowing attributes to bypass application security policies. Attackers can preserve sensitive attributes on custom elements that later re-inject them into innerHTML sinks, creating second-order XSS gadgets.","status":"published","published":"2026-07-24T13:18:28.72Z","modified":"2026-10-24T13:10:00.147Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:32.473901Z"}],"osv":[{"id":"CVE-2026-66010","title":"DOMPurify before 3.4.12 Hook Bypass via CUSTOM_ELEMENT_HANDLING","description":"DOMPurify before 3.4.12 fails to execute afterSanitizeElements hook for custom elements allowed via CUSTOM_ELEMENT_HANDLING.tagNameCheck, allowing attributes to bypass application security policies. Attackers can preserve sensitive attributes on custom elements that later re-inject them into innerHTML sinks, creating second-order XSS gadgets.","status":"published","published":"2026-07-24T12:07:57.374Z","modified":"2026-10-28T02:31:01.61207757Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:45:14.46177Z"},{"id":"DEBIAN-CVE-2026-66010","description":"DOMPurify before 3.4.12 fails to execute afterSanitizeElements hook for custom elements allowed via CUSTOM_ELEMENT_HANDLING.tagNameCheck, allowing attributes to bypass application security policies. Attackers can preserve sensitive attributes on custom elements that later re-inject them into innerHTML sinks, creating second-order XSS gadgets.","status":"published","published":"2026-07-24T13:18:28.72Z","modified":"2026-10-25T09:47:35.595598853Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"updated_at":"2026-11-02T15:45:58.699079Z"},{"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-jxrp-r7gx-q4j8","title":"Duplicate Advisory: DOMPurify: `CUSTOM_ELEMENT_HANDLING` bypasses `afterSanitizeElements` for allowed custom elements.","description":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-c2j3-45gr-mqc4. This link is maintained to preserve external references.\n\n## Original Description\n\nDOMPurify before 3.4.12 fails to execute afterSanitizeElements hook for custom elements allowed via CUSTOM_ELEMENT_HANDLING.tagNameCheck, allowing attributes to bypass application security policies. Attackers can preserve sensitive attributes on custom elements that later re-inject them into innerHTML sinks, creating second-order XSS gadgets.","status":"withdrawn","published":"2026-07-24T15:33:01Z","modified":"2026-10-02T23:00:16.781604108Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"},{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:51.10002Z"},{"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":"UBUNTU-CVE-2026-66010","description":"DOMPurify before 3.4.12 fails to execute afterSanitizeElements hook for custom elements allowed via CUSTOM_ELEMENT_HANDLING.tagNameCheck, allowing attributes to bypass application security policies. Attackers can preserve sensitive attributes on custom elements that later re-inject them into innerHTML sinks, creating second-order XSS gadgets.","status":"published","published":"2026-07-24T13:18:00Z","modified":"2026-07-29T08:01:44Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"},{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:56:53.710209Z"},{"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-2026-1784769611","title":"TuxCare security update for dompurify (2 CVEs)","description":"TuxCare rebuilt dompurify to address 2 CVEs. Fixed in 2.5.9-tuxcare.5.","status":"published","published":"2026-08-04T14:52:48Z","modified":"2026-10-15T09:47:36.770143013Z","updated_at":"2026-11-02T15:43:46.482572Z"},{"id":"CLSA-2026-1784856216","title":"TuxCare security update for dompurify (3 CVEs)","description":"TuxCare rebuilt dompurify to address 3 CVEs. Fixed in 2.5.8-tuxcare.6.","status":"published","published":"2026-08-04T14:52:48Z","modified":"2026-10-15T09:47:54.837368119Z","updated_at":"2026-11-02T15:43:46.482572Z"},{"id":"CLSA-2026-1786539981","title":"TuxCare security update for dompurify (10 CVEs)","description":"TuxCare rebuilt dompurify to address 10 CVEs. Fixed in 2.3.0-tuxcare.1.","status":"withdrawn","published":"2026-08-12T13:06:21Z","modified":"2026-10-26T13:21:31Z","updated_at":"2026-11-02T15:43:46.850893Z"},{"id":"CLSA-2026-1786636600","title":"TuxCare security update for dompurify (16 CVEs)","description":"TuxCare rebuilt dompurify to address 16 CVEs. Fixed in 2.4.0-tuxcare.1.","status":"withdrawn","published":"2026-08-13T15:56:40Z","modified":"2026-10-26T13:21:31Z","updated_at":"2026-11-02T15:43:47.20725Z"},{"id":"CLSA-2026-1786636613","title":"TuxCare security update for dompurify (11 CVEs)","description":"TuxCare rebuilt dompurify to address 11 CVEs. Fixed in 2.4.3-tuxcare.1.","status":"withdrawn","published":"2026-08-13T15:56:53Z","modified":"2026-10-26T13:21:31Z","updated_at":"2026-11-02T15:43:47.20725Z"},{"id":"CLSA-2026-1786636721","title":"TuxCare security update for dompurify (14 CVEs)","description":"TuxCare rebuilt dompurify to address 14 CVEs. Fixed in 2.4.7-tuxcare.1.","status":"withdrawn","published":"2026-08-13T15:58:41Z","modified":"2026-10-26T13:21:31Z","updated_at":"2026-11-02T15:43:47.20725Z"},{"id":"CLSA-2026-1786731853","title":"TuxCare security update for dompurify (10 CVEs)","description":"TuxCare rebuilt dompurify to address 10 CVEs. Fixed in 3.2.3-tuxcare.3.","status":"published","published":"2026-08-14T18:24:13Z","modified":"2026-10-15T09:46:00.690246088Z","updated_at":"2026-11-02T15:43:47.20725Z"},{"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":"CLSA-2026-1786731971","title":"TuxCare security update for dompurify (7 CVEs)","description":"TuxCare rebuilt dompurify to address 7 CVEs. Fixed in 3.1.6-tuxcare.7.","status":"published","published":"2026-08-14T18:26:11Z","modified":"2026-10-15T09:45:59.894668945Z","updated_at":"2026-11-02T15:43:47.20725Z"},{"id":"CLSA-2026-1789152222","title":"TuxCare security update for dompurify (11 CVEs)","description":"TuxCare rebuilt dompurify to address 11 CVEs. Fixed in 2.3.0-tuxcare.5.","status":"published","published":"2026-09-11T18:43:42Z","modified":"2026-10-16T19:13:13.829024571Z","updated_at":"2026-11-02T15:43:47.938828Z"},{"id":"CLSA-2026-1789153936","title":"TuxCare security update for dompurify (9 CVEs)","description":"TuxCare rebuilt dompurify to address 9 CVEs. Fixed in 2.4.0-tuxcare.5.","status":"published","published":"2026-09-11T19:12:16Z","modified":"2026-10-16T19:13:12.92826655Z","updated_at":"2026-11-02T15:43:47.938828Z"},{"id":"CLSA-2026-1789154068","title":"TuxCare security update for dompurify (12 CVEs)","description":"TuxCare rebuilt dompurify to address 12 CVEs. Fixed in 3.0.3-tuxcare.5.","status":"published","published":"2026-09-11T19:14:28Z","modified":"2026-10-16T19:13:11.209772816Z","updated_at":"2026-11-02T15:43:47.938828Z"},{"id":"CLSA-2026-1789154458","title":"TuxCare security update for dompurify (9 CVEs)","description":"TuxCare rebuilt dompurify to address 9 CVEs. Fixed in 2.4.7-tuxcare.5.","status":"published","published":"2026-09-11T19:20:58Z","modified":"2026-10-16T19:13:12.113864827Z","updated_at":"2026-11-02T15:43:47.938828Z"},{"id":"CLSA-2026-1789155659","title":"TuxCare security update for dompurify (12 CVEs)","description":"TuxCare rebuilt dompurify to address 12 CVEs. Fixed in 2.4.3-tuxcare.8.","status":"published","published":"2026-09-11T19:40:59Z","modified":"2026-10-16T19:13:13.533550553Z","updated_at":"2026-11-02T15:43:47.938828Z"},{"id":"CLSA-2026-1789400953","title":"TuxCare security update for dompurify (4 CVEs)","description":"TuxCare rebuilt dompurify to address 4 CVEs. Fixed in 3.2.7-tuxcare.3.","status":"published","published":"2026-09-14T15:49:13Z","modified":"2026-10-15T09:47:56.145134883Z","updated_at":"2026-11-02T15:43:47.938828Z"},{"id":"CLSA-2026-1789404783","title":"TuxCare security update for dompurify (2 CVEs)","description":"TuxCare rebuilt dompurify to address 2 CVEs. Fixed in 3.4.8-tuxcare.4.","status":"published","published":"2026-09-14T16:53:03Z","modified":"2026-10-15T09:47:56.261123389Z","updated_at":"2026-11-02T15:43:47.938828Z"},{"id":"CLSA-2026-1791798931","title":"TuxCare security update for dompurify (1 CVE)","description":"TuxCare rebuilt dompurify to address 1 CVE. Fixed in 3.4.11-tuxcare.1.","status":"published","published":"2026-10-12T09:55:31Z","modified":"2026-10-15T09:47:40.137215019Z","updated_at":"2026-11-02T15:43:50.599064Z"},{"id":"CLSA-2026-1791806751","title":"TuxCare security update for dompurify (1 CVE)","description":"TuxCare rebuilt dompurify to address 1 CVE. Fixed in 3.4.10-tuxcare.1.","status":"published","published":"2026-10-12T12:05:51Z","modified":"2026-10-15T09:47:58.568525514Z","updated_at":"2026-11-02T15:43:50.599064Z"},{"id":"CLSA-2026-1791815045","title":"TuxCare security update for dompurify (1 CVE)","description":"TuxCare rebuilt dompurify to address 1 CVE. Fixed in 3.4.9-tuxcare.1.","status":"published","published":"2026-10-12T14:24:05Z","modified":"2026-10-15T09:47:40.19626685Z","updated_at":"2026-11-02T15:43:50.599064Z"},{"id":"CLSA-2026-1791821569","title":"TuxCare security update for dompurify (1 CVE)","description":"TuxCare rebuilt dompurify to address 1 CVE. Fixed in 3.4.7-tuxcare.1.","status":"published","published":"2026-10-12T16:12:49Z","modified":"2026-10-15T09:47:40.245012837Z","updated_at":"2026-11-02T15:43:50.599064Z"},{"id":"CLSA-2026-1791825656","title":"TuxCare security update for dompurify (1 CVE)","description":"TuxCare rebuilt dompurify to address 1 CVE. Fixed in 3.4.6-tuxcare.1.","status":"published","published":"2026-10-12T17:20:56Z","modified":"2026-10-15T09:47:40.245804005Z","updated_at":"2026-11-02T15:43:50.599064Z"},{"id":"CLSA-2026-1791849797","title":"TuxCare security update for dompurify (1 CVE)","description":"TuxCare rebuilt dompurify to address 1 CVE. Fixed in 3.4.5-tuxcare.1.","status":"published","published":"2026-10-13T00:03:17Z","modified":"2026-10-15T09:47:53.550642941Z","updated_at":"2026-11-02T15:43:50.599064Z"},{"id":"CLSA-2026-1792155851","title":"TuxCare security update for dompurify (12 CVEs)","description":"TuxCare rebuilt dompurify to address 12 CVEs. Fixed in 3.1.3-tuxcare.2.","status":"published","published":"2026-10-16T13:04:11Z","modified":"2026-10-21T20:43:23.163914038Z","updated_at":"2026-11-02T15:43:50.949147Z"},{"id":"CLSA-2026-1792156267","title":"TuxCare security update for dompurify (9 CVEs)","description":"TuxCare rebuilt dompurify to address 9 CVEs. Fixed in 3.1.2-tuxcare.2.","status":"published","published":"2026-10-16T13:11:07Z","modified":"2026-10-21T20:43:22.742858668Z","updated_at":"2026-11-02T15:43:50.949147Z"},{"id":"CLSA-2026-1792156282","title":"TuxCare security update for dompurify (11 CVEs)","description":"TuxCare rebuilt dompurify to address 11 CVEs. Fixed in 3.1.4-tuxcare.2.","status":"published","published":"2026-10-16T13:11:22Z","modified":"2026-10-21T20:43:22.552871845Z","updated_at":"2026-11-02T15:43:50.949147Z"},{"id":"CLSA-2026-1792156382","title":"TuxCare security update for dompurify (9 CVEs)","description":"TuxCare rebuilt dompurify to address 9 CVEs. Fixed in 3.0.2-tuxcare.2.","status":"published","published":"2026-10-16T13:13:02Z","modified":"2026-10-21T20:43:22.190952605Z","updated_at":"2026-11-02T15:43:50.949147Z"},{"id":"CLSA-2026-1792156589","title":"TuxCare security update for dompurify (10 CVEs)","description":"TuxCare rebuilt dompurify to address 10 CVEs. Fixed in 3.0.9-tuxcare.2.","status":"published","published":"2026-10-16T13:16:29Z","modified":"2026-10-21T20:43:20.928803832Z","updated_at":"2026-11-02T15:43:50.949147Z"},{"id":"CLSA-2026-1792156694","title":"TuxCare security update for dompurify (11 CVEs)","description":"TuxCare rebuilt dompurify to address 11 CVEs. Fixed in 3.0.8-tuxcare.2.","status":"published","published":"2026-10-16T13:18:14Z","modified":"2026-10-21T20:43:18.588659369Z","updated_at":"2026-11-02T15:43:50.949147Z"},{"id":"CLSA-2026-1792156909","title":"TuxCare security update for dompurify (10 CVEs)","description":"TuxCare rebuilt dompurify to address 10 CVEs. Fixed in 3.0.1-tuxcare.2.","status":"published","published":"2026-10-16T13:21:49Z","modified":"2026-10-21T20:43:22.31228165Z","updated_at":"2026-11-02T15:43:50.949147Z"},{"id":"CLSA-2026-1792157013","title":"TuxCare security update for dompurify (13 CVEs)","description":"TuxCare rebuilt dompurify to address 13 CVEs. Fixed in 3.1.0-tuxcare.2.","status":"published","published":"2026-10-16T13:23:33Z","modified":"2026-10-21T20:43:22.452640022Z","updated_at":"2026-11-02T15:43:50.949147Z"},{"id":"CLSA-2026-1792157113","title":"TuxCare security update for dompurify (12 CVEs)","description":"TuxCare rebuilt dompurify to address 12 CVEs. Fixed in 3.0.11-tuxcare.2.","status":"published","published":"2026-10-16T13:25:13Z","modified":"2026-10-21T20:43:21.625485698Z","updated_at":"2026-11-02T15:43:50.949147Z"},{"id":"CLSA-2026-1792161408","title":"TuxCare security update for dompurify (8 CVEs)","description":"TuxCare rebuilt dompurify to address 8 CVEs. Fixed in 3.1.1-tuxcare.2.","status":"published","published":"2026-10-16T14:36:47Z","modified":"2026-10-21T20:43:19.85040711Z","updated_at":"2026-11-02T15:43:51.213191Z"},{"id":"CLSA-2026-1792161492","title":"TuxCare security update for dompurify (10 CVEs)","description":"TuxCare rebuilt dompurify to address 10 CVEs. Fixed in 3.2.6-tuxcare.2.","status":"published","published":"2026-10-16T14:38:11Z","modified":"2026-10-16T16:30:09.033084778Z","updated_at":"2026-11-02T15:43:51.213191Z"},{"id":"CLSA-2026-1792163693","title":"TuxCare security update for dompurify (1 CVE)","description":"TuxCare rebuilt dompurify to address 1 CVE. Fixed in 3.0.6-tuxcare.2.","status":"published","published":"2026-10-16T15:14:53Z","modified":"2026-10-16T16:32:04.225267798Z","updated_at":"2026-11-02T15:43:51.466048Z"},{"id":"CLSA-2026-1792424561","title":"TuxCare security update for dompurify (9 CVEs)","description":"TuxCare rebuilt dompurify to address 9 CVEs. Fixed in 3.3.3-tuxcare.3.","status":"published","published":"2026-10-19T15:42:41Z","modified":"2026-10-19T19:15:12.229054081Z","updated_at":"2026-11-02T15:43:54.119956Z"},{"id":"CLSA-2026-1792424891","title":"TuxCare security update for dompurify (13 CVEs)","description":"TuxCare rebuilt dompurify to address 13 CVEs. Fixed in 2.3.10-tuxcare.3.","status":"published","published":"2026-10-19T15:48:11Z","modified":"2026-10-19T19:15:02.914996103Z","updated_at":"2026-11-02T15:43:54.119956Z"},{"id":"CLSA-2026-1792453557","title":"TuxCare security update for dompurify (5 CVEs)","description":"TuxCare rebuilt dompurify to address 5 CVEs. Fixed in 3.0.5-tuxcare.2.","status":"published","published":"2026-10-19T23:45:57Z","modified":"2026-10-20T01:45:14.102972225Z","updated_at":"2026-11-02T15:43:54.378946Z"},{"id":"CLSA-2026-1792479087","title":"TuxCare security update for dompurify (5 CVEs)","description":"TuxCare rebuilt dompurify to address 5 CVEs. Fixed in 3.0.4-tuxcare.2.","status":"published","published":"2026-10-20T06:51:27Z","modified":"2026-10-20T13:45:06.956605427Z","updated_at":"2026-11-02T15:43:54.378946Z"},{"id":"CLSA-2026-1792933945","title":"TuxCare security update for dompurify (12 CVEs)","description":"TuxCare rebuilt dompurify to address 12 CVEs. Fixed in 3.4.0-tuxcare.1.","status":"published","published":"2026-10-25T13:12:25Z","modified":"2026-10-25T19:15:03.066551076Z","updated_at":"2026-11-02T15:43:54.981307Z"},{"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-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"}]},"sources_more":{"osv":3}}