Medium
node-handlebars, ruby-handlebars-assets — security advisory
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 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.
- Products
- node-handlebars, ruby-handlebars-assets
- Affected versions
- 0.15-2, 2:0.20.2-2, 2:0.21.0-2, 2:0.21.0-3, 2:0.21.0-4, 2:0.21.0-5, 2:0.23.1-1, 2:0.23.2+dfsg-2, 2:0.23.2-2, 2:0.23.3+dfsg-2, 2:0.23.8+dfsg-3, 2:0.23.8+dfsg-4, 2:0.23.9+dfsg-1, 3:4.0.10-5, 3:4.1.0-1, 3:4.5.3-1, 3:4.7.2-1, 3:4.7.6+~4.1.0-2, 3:4.7.7+~4.1.0-1, 3:4.7.9-5
- Fixed versions
- Not specified
- CVEs
- CVE-2026-106444
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:58 UTC · Revision 1
Source evidence
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 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.
osv:UBUNTU-CVE-2026-106444
ruby-handlebars-assets
Fixed versions: Not specified
node-handlebars
Fixed versions: Not specified
ruby-handlebars-assets
Fixed versions: Not specified
node-handlebars
Fixed versions: Not specified
ruby-handlebars-assets
Fixed versions: Not specified
node-handlebars
Fixed versions: Not specified
ruby-handlebars-assets
Fixed versions: Not specified
node-handlebars
Fixed versions: Not specified
ruby-handlebars-assets
Fixed versions: Not specified
node-handlebars
Fixed versions: Not specified
node-handlebars
Fixed versions: Not specified
Complete source record
{
"id": "18d6d25fe3ddc8b82de3fcaa2993605952c9b7cb19af82068feb7d4750e1f3ce",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-106444",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-106444",
"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 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.",
"evidence": "osv:UBUNTU-CVE-2026-106444",
"products": [
{
"name": {
"value": "ruby-handlebars-assets",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.15-2",
"evidence": "/affected/0/versions"
},
{
"value": "2:0.20.2-2",
"evidence": "/affected/0/versions"
},
{
"value": "2:0.21.0-2",
"evidence": "/affected/0/versions"
},
{
"value": "2:0.21.0-3",
"evidence": "/affected/0/versions"
},
{
"value": "2:0.21.0-4",
"evidence": "/affected/0/versions"
},
{
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"evidence": "/affected/0/versions"
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]
},
{
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"evidence": "/affected/1/package/name"
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"affected_versions": [
{
"value": "3:4.0.10-5",
"evidence": "/affected/1/versions"
}
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{
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"evidence": "/affected/2/package/name"
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"affected_versions": [
{
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"evidence": "/affected/2/versions"
},
{
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"evidence": "/affected/2/versions"
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{
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{
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"evidence": "/affected/3/versions"
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"affected_versions": [
{
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{
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"evidence": "/affected/6/versions"
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"evidence": "/affected/6/versions"
}
]
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{
"name": {
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"evidence": "/affected/7/package/name"
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"affected_versions": [
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"evidence": "/affected/7/versions"
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{
"name": {
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"evidence": "/affected/8/package/name"
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"affected_versions": [
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"evidence": "/affected/10/versions"
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}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-106444",
"aliases": [
"UBUNTU-CVE-2026-106444"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
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"type": "ECOSYSTEM",
"events": [
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],
"package": {
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"ecosystem": "Ubuntu:16.04:LTS"
},
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"2:0.20.2-2",
"2:0.21.0-2",
"2:0.21.0-3",
"2:0.21.0-4",
"2:0.21.0-5"
],
"database_specific": {
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},
"ecosystem_specific": {
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],
"modified": "2026-10-17T12:58:00.225302695Z",
"provider": "osv",
"upstream": [
"CVE-2026-106444"
],
"references": [
"https://ubuntu.com/security/CVE-2026-106444",
"https://www.cve.org/CVERecord?id=CVE-2026-106444",
"https://github.com/handlebars-lang/handlebars.js/security/advisories/GHSA-xw65-4hp5-5hc7",
"https://github.com/handlebars-lang/handlebars.js/pull/2185"
]
},
"related_cves": [
{
"value": "CVE-2026-106444",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 357849,
"published_at": "2026-10-06T20:17:00+00:00"
}