Medium
node-brace-expansion — security advisory
The brace-expansion library generates arbitrary strings containing a common prefix and suffix. Prior to 1.1.21, 2.1.7, 3.0.9, and 5.0.12, the expand function handles untrusted {a},b}-shaped patterns with many trailing closing braces by restarting its scan once for each trailing closing brace. The successive full-input rescans with linear working-string growth cause quadratic CPU time and memory pressure that can block the Node.js event loop. The process eventually recovers, making the impact a recoverable CPU denial of service. This issue is fixed in versions 1.1.21, 2.1.7, 3.0.9, and 5.0.12.
- Products
- node-brace-expansion
- Affected versions
- 1.1.11-1, 1.1.8-1, 2.0.0-1, 2.0.1+~1.1.0-1, 2.0.1+~1.1.0-2, 2.0.1-1, 2.0.1-2, 2.0.3+~1.1.2-2, 2.0.3+~1.1.2-3, 2.1.4+~1.1.2-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-102277
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:53 UTC · Revision 1
Source evidence
The brace-expansion library generates arbitrary strings containing a common prefix and suffix. Prior to 1.1.21, 2.1.7, 3.0.9, and 5.0.12, the expand function handles untrusted {a},b}-shaped patterns with many trailing closing braces by restarting its scan once for each trailing closing brace. The successive full-input rescans with linear working-string growth cause quadratic CPU time and memory pressure that can block the Node.js event loop. The process eventually recovers, making the impact a recoverable CPU denial of service. This issue is fixed in versions 1.1.21, 2.1.7, 3.0.9, and 5.0.12.
osv:UBUNTU-CVE-2026-102277
node-brace-expansion
Fixed versions: Not specified
node-brace-expansion
Fixed versions: Not specified
node-brace-expansion
Fixed versions: Not specified
node-brace-expansion
Fixed versions: Not specified
node-brace-expansion
Fixed versions: Not specified
node-brace-expansion
Fixed versions: Not specified
Complete source record
{
"id": "3fed3324b3c9872a6a6d2042dfa0d7bfef3d93e4c1bbf7169ae1a98b13194f1e",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-102277",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-102277",
"summary": "The brace-expansion library generates arbitrary strings containing a common prefix and suffix. Prior to 1.1.21, 2.1.7, 3.0.9, and 5.0.12, the expand function handles untrusted {a},b}-shaped patterns with many trailing closing braces by restarting its scan once for each trailing closing brace. The successive full-input rescans with linear working-string growth cause quadratic CPU time and memory pressure that can block the Node.js event loop. The process eventually recovers, making the impact a recoverable CPU denial of service. This issue is fixed in versions 1.1.21, 2.1.7, 3.0.9, and 5.0.12.",
"evidence": "osv:UBUNTU-CVE-2026-102277",
"products": [
{
"name": {
"value": "node-brace-expansion",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.1.8-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
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"evidence": "/affected/1/package/name"
},
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"affected_versions": [
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"evidence": "/affected/1/versions"
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{
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"evidence": "/affected/1/versions"
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},
{
"name": {
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"evidence": "/affected/2/package/name"
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"affected_versions": [
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{
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"evidence": "/affected/2/versions"
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},
{
"name": {
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"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0.1-2",
"evidence": "/affected/3/versions"
},
{
"value": "2.0.1+~1.1.0-1",
"evidence": "/affected/3/versions"
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},
{
"name": {
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"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
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"evidence": "/affected/4/versions"
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{
"value": "2.0.3+~1.1.2-2",
"evidence": "/affected/4/versions"
},
{
"value": "2.0.3+~1.1.2-3",
"evidence": "/affected/4/versions"
},
{
"value": "2.1.4+~1.1.2-1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "node-brace-expansion",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0.1+~1.1.0-2",
"evidence": "/affected/5/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-102277",
"aliases": [
"UBUNTU-CVE-2026-102277"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-brace-expansion",
"purl": "pkg:deb/ubuntu/node-brace-expansion?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"1.1.8-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102277.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-brace-expansion",
"binary_version": "1.1.8-1"
}
]
}
},
{
"ranges": [
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],
"package": {
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"purl": "pkg:deb/ubuntu/node-brace-expansion?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"1.1.8-1",
"1.1.11-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102277.json"
},
"ecosystem_specific": {
"binaries": [
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},
{
"ranges": [
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],
"package": {
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"purl": "pkg:deb/ubuntu/node-brace-expansion?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"2.0.0-1",
"2.0.1-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102277.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-brace-expansion",
"binary_version": "2.0.1-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
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],
"package": {
"name": "node-brace-expansion",
"purl": "pkg:deb/ubuntu/node-brace-expansion?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"2.0.1-2",
"2.0.1+~1.1.0-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102277.json"
},
"ecosystem_specific": {
"binaries": [
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},
{
"ranges": [
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"package": {
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"purl": "pkg:deb/ubuntu/node-brace-expansion?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"2.0.1+~1.1.0-2",
"2.0.3+~1.1.2-2",
"2.0.3+~1.1.2-3",
"2.1.4+~1.1.2-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102277.json"
},
"ecosystem_specific": {
"binaries": [
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"binary_name": "node-brace-expansion",
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},
{
"ranges": [
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],
"package": {
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"purl": "pkg:deb/ubuntu/node-brace-expansion?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"2.0.1+~1.1.0-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102277.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-brace-expansion",
"binary_version": "2.0.1+~1.1.0-2"
}
]
}
}
],
"modified": "2026-10-17T12:59:45.831629229Z",
"provider": "osv",
"upstream": [
"CVE-2026-102277"
],
"references": [
"https://ubuntu.com/security/CVE-2026-102277",
"https://www.cve.org/CVERecord?id=CVE-2026-102277",
"https://github.com/juliangruber/brace-expansion/commit/33a5ef17b8d800bbfa8c52b14c39043b6aac1a96",
"https://github.com/juliangruber/brace-expansion/commit/bdff773f98e5988616b7039cc9b508df5d640b22",
"https://github.com/juliangruber/brace-expansion/commit/c55e67d8d8b1c56a2474afff15c2891166b2d364",
"https://github.com/juliangruber/brace-expansion/commit/ffdfa3e3806bed17c0874b8f1439b084de354a7e",
"https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-q2hr-2g5m-vwhr"
]
},
"related_cves": [
{
"value": "CVE-2026-102277",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 359749,
"published_at": "2026-09-28T21:17:00+00:00"
}