High
node-shell-quote — security advisory
shell-quote prior to 1.8.5 finalizes parsed tokens in parse() using Array.prototype.concat as a reduce accumulator, which reallocates and copies the entire growing array on every iteration. As a result parse() runs in O(n^2) time relative to the number of input tokens. An attacker who can supply an attacker-controlled string to any code path that calls parse() (no shell metacharacters are required; plain space-separated words suffice) can block the single-threaded Node.js event loop for an extended period with a small input, resulting in a denial of service. There is no code execution or data disclosure; impact is to availability only. Fixed in 1.8.5.
- Products
- node-shell-quote
- Affected versions
- 1.10.0-1, 1.6.1+20160617-git72fb5a8ce29b-1, 1.6.1+20160617-git72fb5a8ce29b-1ubuntu0.1~esm1, 1.7.3+~1.7.1-1, 1.7.3+~1.7.1-1ubuntu0.1~esm1, 1.7.4+~1.7.1-1, 1.7.4+~1.7.1-1ubuntu0.24.04.1, 1.7.4+~1.7.1-1ubuntu0.25.10.1, 1.8.3+~1.7.5-1, 1.8.3+~1.7.5-1ubuntu0.1~esm1, 1.9.0+~1.7.5-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-13311
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:40 UTC · Revision 1
Source evidence
shell-quote prior to 1.8.5 finalizes parsed tokens in parse() using Array.prototype.concat as a reduce accumulator, which reallocates and copies the entire growing array on every iteration. As a result parse() runs in O(n^2) time relative to the number of input tokens. An attacker who can supply an attacker-controlled string to any code path that calls parse() (no shell metacharacters are required; plain space-separated words suffice) can block the single-threaded Node.js event loop for an extended period with a small input, resulting in a denial of service. There is no code execution or data disclosure; impact is to availability only. Fixed in 1.8.5.
osv:UBUNTU-CVE-2026-13311
node-shell-quote
Fixed versions: Not specified
node-shell-quote
Fixed versions: Not specified
node-shell-quote
Fixed versions: Not specified
node-shell-quote
Fixed versions: Not specified
node-shell-quote
Fixed versions: Not specified
node-shell-quote
Fixed versions: Not specified
Complete source record
{
"id": "261745f8128f45b9e26dd3ed3f3abc972104a0c65b9f48538cf9b9c8bcf97d21",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-13311",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-13311",
"summary": "shell-quote prior to 1.8.5 finalizes parsed tokens in parse() using Array.prototype.concat as a reduce accumulator, which reallocates and copies the entire growing array on every iteration. As a result parse() runs in O(n^2) time relative to the number of input tokens. An attacker who can supply an attacker-controlled string to any code path that calls parse() (no shell metacharacters are required; plain space-separated words suffice) can block the single-threaded Node.js event loop for an extended period with a small input, resulting in a denial of service. There is no code execution or data disclosure; impact is to availability only. Fixed in 1.8.5.",
"evidence": "osv:UBUNTU-CVE-2026-13311",
"products": [
{
"name": {
"value": "node-shell-quote",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.6.1+20160617-git72fb5a8ce29b-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.6.1+20160617-git72fb5a8ce29b-1ubuntu0.1~esm1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "node-shell-quote",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.7.3+~1.7.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.7.3+~1.7.1-1ubuntu0.1~esm1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "node-shell-quote",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.7.4+~1.7.1-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.7.4+~1.7.1-1ubuntu0.24.04.1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
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"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.7.4+~1.7.1-1",
"evidence": "/affected/3/versions"
},
{
"value": "1.7.4+~1.7.1-1ubuntu0.25.10.1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "node-shell-quote",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.8.3+~1.7.5-1",
"evidence": "/affected/4/versions"
},
{
"value": "1.9.0+~1.7.5-1",
"evidence": "/affected/4/versions"
},
{
"value": "1.10.0-1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "node-shell-quote",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.7.4+~1.7.1-1",
"evidence": "/affected/5/versions"
},
{
"value": "1.8.3+~1.7.5-1",
"evidence": "/affected/5/versions"
},
{
"value": "1.8.3+~1.7.5-1ubuntu0.1~esm1",
"evidence": "/affected/5/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-13311",
"aliases": [
"UBUNTU-CVE-2026-13311"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-shell-quote",
"purl": "pkg:deb/ubuntu/node-shell-quote?arch=source&distro=esm-apps%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
"1.6.1+20160617-git72fb5a8ce29b-1",
"1.6.1+20160617-git72fb5a8ce29b-1ubuntu0.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13311.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-shell-quote",
"binary_version": "1.6.1+20160617-git72fb5a8ce29b-1ubuntu0.1~esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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}
]
}
],
"package": {
"name": "node-shell-quote",
"purl": "pkg:deb/ubuntu/node-shell-quote?arch=source&distro=esm-apps%2Fjammy",
"ecosystem": "Ubuntu:Pro:22.04:LTS"
},
"versions": [
"1.7.3+~1.7.1-1",
"1.7.3+~1.7.1-1ubuntu0.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13311.json"
},
"ecosystem_specific": {
"binaries": [
{
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}
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}
},
{
"ranges": [
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],
"package": {
"name": "node-shell-quote",
"purl": "pkg:deb/ubuntu/node-shell-quote?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"1.7.4+~1.7.1-1",
"1.7.4+~1.7.1-1ubuntu0.24.04.1"
],
"database_specific": {
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},
"ecosystem_specific": {
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{
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"package": {
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"purl": "pkg:deb/ubuntu/node-shell-quote?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"1.7.4+~1.7.1-1",
"1.7.4+~1.7.1-1ubuntu0.25.10.1"
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"ecosystem": "Ubuntu:26.10"
},
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"1.9.0+~1.7.5-1",
"1.10.0-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13311.json"
},
"ecosystem_specific": {
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}
},
{
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"package": {
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"purl": "pkg:deb/ubuntu/node-shell-quote?arch=source&distro=esm-apps%2Fresolute",
"ecosystem": "Ubuntu:Pro:26.04:LTS"
},
"versions": [
"1.7.4+~1.7.1-1",
"1.8.3+~1.7.5-1",
"1.8.3+~1.7.5-1ubuntu0.1~esm1"
],
"database_specific": {
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},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-shell-quote",
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}
]
}
}
],
"modified": "2026-10-17T12:58:45.484751980Z",
"provider": "osv",
"upstream": [
"CVE-2026-13311"
],
"references": [
"https://ubuntu.com/security/CVE-2026-13311",
"https://www.cve.org/CVERecord?id=CVE-2026-13311",
"https://github.com/ljharb/shell-quote/security/advisories/GHSA-395f-4hp3-45gv",
"https://www.npmjs.com/package/shell-quote"
]
},
"related_cves": [
{
"value": "CVE-2026-13311",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 359009,
"published_at": "2026-06-25T05:16:00+00:00"
}