node-shell-quote — security advisory
shell-quote's `quote()` function did not validate object-token inputs against the operator model used by `parse()`. The `.op` field was backslash-escaped character by character using `/(.)/g`, which in JavaScript does not match line terminators (\n, \r, U+2028, U+2029). A line terminator in `.op` therefore passed through unescaped into the output; POSIX shells treat a literal newline as a command separator, so any content after it would execute as a second command. The vulnerable code path is reachable in two ways: (1) direct construction of `{ op: '...\n...' }` from external input, and (2) via `parse(cmd, envFn)` when `envFn` returns object tokens whose `.op` is attacker-influenced. Both are documented API surface. Fixed by replacing the per-character escape with strict shape validation: `.op` must match the parser's control-operator allowlist; `{ op: 'glob', pattern }` validates `pattern` and forbids line terminators; `{ comment }` validates `comment` and forbids line terminators; any other object shape throws `TypeError`.
- Products
- node-shell-quote
- Affected versions
- 1.10.0-1, 1.6.1+20160617-git72fb5a8ce29b-1, 1.7.3+~1.7.1-1, 1.7.4+~1.7.1-1, 1.8.3+~1.7.5-1, 1.9.0+~1.7.5-1
- Fixed versions
- 1.6.1+20160617-git72fb5a8ce29b-1ubuntu0.1~esm1, 1.7.3+~1.7.1-1ubuntu0.1~esm1, 1.7.4+~1.7.1-1ubuntu0.24.04.1, 1.7.4+~1.7.1-1ubuntu0.25.10.1, 1.8.3+~1.7.5-1ubuntu0.1~esm1
- CVEs
- CVE-2026-9277
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:32 UTC · Revision 1
Source evidence
shell-quote's `quote()` function did not validate object-token inputs against the operator model used by `parse()`. The `.op` field was backslash-escaped character by character using `/(.)/g`, which in JavaScript does not match line terminators (\n, \r, U+2028, U+2029). A line terminator in `.op` therefore passed through unescaped into the output; POSIX shells treat a literal newline as a command separator, so any content after it would execute as a second command. The vulnerable code path is reachable in two ways: (1) direct construction of `{ op: '...\n...' }` from external input, and (2) via `parse(cmd, envFn)` when `envFn` returns object tokens whose `.op` is attacker-influenced. Both are documented API surface. Fixed by replacing the per-character escape with strict shape validation: `.op` must match the parser's control-operator allowlist; `{ op: 'glob', pattern }` validates `pattern` and forbids line terminators; `{ comment }` validates `comment` and forbids line terminators; any other object shape throws `TypeError`.
osv:UBUNTU-CVE-2026-9277
node-shell-quote
Fixed versions: 1.6.1+20160617-git72fb5a8ce29b-1ubuntu0.1~esm1
node-shell-quote
Fixed versions: 1.7.3+~1.7.1-1ubuntu0.1~esm1
node-shell-quote
Fixed versions: 1.7.4+~1.7.1-1ubuntu0.24.04.1
node-shell-quote
Fixed versions: 1.7.4+~1.7.1-1ubuntu0.25.10.1
node-shell-quote
Fixed versions: Not specified
node-shell-quote
Fixed versions: 1.8.3+~1.7.5-1ubuntu0.1~esm1
Complete source record
{
"id": "e3917ae9a5c9752de3440fe2856e29c96bf6e8c5a25943e232e692fa6da84e66",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-9277",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-9277",
"summary": "shell-quote's `quote()` function did not validate object-token inputs against the operator model used by `parse()`. The `.op` field was backslash-escaped character by character using `/(.)/g`, which in JavaScript does not match line terminators (\\n, \\r, U+2028, U+2029). A line terminator in `.op` therefore passed through unescaped into the output; POSIX shells treat a literal newline as a command separator, so any content after it would execute as a second command. The vulnerable code path is reachable in two ways: (1) direct construction of `{ op: '...\\n...' }` from external input, and (2) via `parse(cmd, envFn)` when `envFn` returns object tokens whose `.op` is attacker-influenced. Both are documented API surface. Fixed by replacing the per-character escape with strict shape validation: `.op` must match the parser's control-operator allowlist; `{ op: 'glob', pattern }` validates `pattern` and forbids line terminators; `{ comment }` validates `comment` and forbids line terminators; any other object shape throws `TypeError`.",
"evidence": "osv:UBUNTU-CVE-2026-9277",
"products": [
{
"name": {
"value": "node-shell-quote",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.6.1+20160617-git72fb5a8ce29b-1ubuntu0.1~esm1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "1.6.1+20160617-git72fb5a8ce29b-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
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"evidence": "/affected/1/package/name"
},
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"fixed_versions": [
{
"value": "1.7.3+~1.7.1-1ubuntu0.1~esm1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "1.7.3+~1.7.1-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "node-shell-quote",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.7.4+~1.7.1-1ubuntu0.24.04.1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "1.7.4+~1.7.1-1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "node-shell-quote",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.7.4+~1.7.1-1ubuntu0.25.10.1",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": [
{
"value": "1.7.4+~1.7.1-1",
"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": [
{
"value": "1.8.3+~1.7.5-1ubuntu0.1~esm1",
"evidence": "/affected/5/ranges"
}
],
"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"
}
]
}
],
"severity": "critical",
"structured": {
"id": "UBUNTU-CVE-2026-9277",
"aliases": [
"UBUNTU-CVE-2026-9277"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.1+20160617-git72fb5a8ce29b-1ubuntu0.1~esm1"
}
]
}
],
"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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-9277.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-shell-quote",
"binary_version": "1.6.1+20160617-git72fb5a8ce29b-1ubuntu0.1~esm1"
}
],
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.7.3+~1.7.1-1ubuntu0.1~esm1"
}
]
}
],
"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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-9277.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-shell-quote",
"binary_version": "1.7.3+~1.7.1-1ubuntu0.1~esm1"
}
],
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.7.4+~1.7.1-1ubuntu0.24.04.1"
}
]
}
],
"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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-9277.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-shell-quote",
"binary_version": "1.7.4+~1.7.1-1ubuntu0.24.04.1"
}
],
"availability": "No subscription required"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.7.4+~1.7.1-1ubuntu0.25.10.1"
}
]
}
],
"package": {
"name": "node-shell-quote",
"purl": "pkg:deb/ubuntu/node-shell-quote?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"1.7.4+~1.7.1-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-9277.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-shell-quote",
"binary_version": "1.7.4+~1.7.1-1ubuntu0.25.10.1"
}
],
"availability": "No subscription required"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-shell-quote",
"purl": "pkg:deb/ubuntu/node-shell-quote?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"1.8.3+~1.7.5-1",
"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-2026-9277.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-shell-quote",
"binary_version": "1.10.0-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.8.3+~1.7.5-1ubuntu0.1~esm1"
}
]
}
],
"package": {
"name": "node-shell-quote",
"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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-9277.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-shell-quote",
"binary_version": "1.8.3+~1.7.5-1ubuntu0.1~esm1"
}
],
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}
}
],
"modified": "2026-10-17T13:01:17.626432220Z",
"provider": "osv",
"upstream": [
"CVE-2026-9277"
],
"references": [
"https://ubuntu.com/security/CVE-2026-9277",
"https://www.cve.org/CVERecord?id=CVE-2026-9277",
"https://github.com/ljharb/shell-quote/security/advisories/GHSA-w7jw-789q-3m8p",
"https://github.com/ljharb/shell-quote",
"https://github.com/ljharb/shell-quote/commit/1518179",
"https://www.npmjs.com/package/shell-quote",
"https://github.com/ljharb/shell-quote/commit/4378a6e613db5948168684864e49b42b83134d2d",
"https://ubuntu.com/security/notices/USN-8410-1"
]
},
"related_cves": [
{
"value": "CVE-2026-9277",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/2/score"
},
"source_id": "core-osv",
"document_id": 361524,
"published_at": "2026-05-22T14:16:00+00:00"
}