{"id":"CVE-2026-106444","title":"Handlebars provides the power necessary to let users build semantic templates","summary":"Handlebars provides the power necessary to let users build semantic templates. From 4.0.0 until 4.7.10, Handlebars.precompile() uses quotedString() in lib/handlebars/compiler/code-gen.js to emit static template text into generated JavaSc…","severity":"medium","cvss":4.7,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-116","CWE-79"],"vendor":"handlebars-lang","product":"handlebars.js","affected":["handlebars.js >= 4.0.0, < 4.7.10"],"published":"2026-10-06","updated":"2026-10-07","sourceUpdated":"2026-10-07T13:58:29.527","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-106444","references":[{"url":"https://github.com/handlebars-lang/handlebars.js/commit/609d1b11c833c9a3e00f56f2f34d22f425446725","label":"security-advisories@github.com"},{"url":"https://github.com/handlebars-lang/handlebars.js/pull/2185","label":"security-advisories@github.com"},{"url":"https://github.com/handlebars-lang/handlebars.js/releases/tag/v4.7.10","label":"security-advisories@github.com"},{"url":"https://github.com/handlebars-lang/handlebars.js/security/advisories/GHSA-xw65-4hp5-5hc7","label":"security-advisories@github.com"},{"url":"https://github.com/handlebars-lang/handlebars.js/security/advisories/GHSA-xw65-4hp5-5hc7","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-106444.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-106444"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2547089"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-106444"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106444"},{"url":"https://github.com/advisories/GHSA-xw65-4hp5-5hc7"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat","ghsa","npm"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-06T19:47:42.547607Z"},"ingestedAt":"2026-10-06T20:16:42.480Z","epss":0.0029,"epssPercentile":0.21464,"aliases":["GHSA-xw65-4hp5-5hc7"],"ecosystem":"npm","patched":["handlebars 4.7.10"],"slug":"CVE-2026-106444","body":"## Overview\n\nHandlebars provides the power necessary to let users build semantic templates. From 4.0.0 until 4.7.10, Handlebars.precompile() uses quotedString() in lib/handlebars/compiler/code-gen.js to emit static template text into generated JavaScript without escaping sequences that terminate an enclosing HTML script element. When an application precompiles attacker-controlled template text and embeds the generated source directly in an inline script element, a closing script delimiter can end the element and cause following attacker-controlled markup to be parsed and executed. Ordinary server-side rendering and precompiled templates served as external JavaScript files are not affected. This issue is fixed in version 4.7.10.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-10-07 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-106444.json)\n\n## Package advisory (CVE-2026-106444)\n\nAffected packages:\n\n- `handlebars >= 4.0.0, <= 4.7.9`\n\nPatched in:\n\n- `handlebars 4.7.10`\n\nSource: https://github.com/advisories/GHSA-xw65-4hp5-5hc7","depth":"twilight","depthScore":38,"depthScoreParts":{"impact":25.9,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}