MediumFix available
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
- 2.0.1+~1.1.0-1, 2.0.1+~1.1.0-2, 2.0.1-2, 2.0.3+~1.1.2-1, 2.0.3+~1.1.2-2, 2.0.3+~1.1.2-3, 2.1.4+~1.1.2-1, 2.1.7+~1.1.2-1
- Fixed versions
- 2.1.7+~1.1.2-1
- CVEs
- CVE-2026-102277
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 12:47 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:DEBIAN-CVE-2026-102277
node-brace-expansion
Fixed versions: Not specified
node-brace-expansion
Fixed versions: Not specified
node-brace-expansion
Fixed versions: 2.1.7+~1.1.2-1
Complete source record
{
"id": "b4806144d487d2e5d18c1400249650d22ec41bff96197dc2bafe7c4323204665",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-102277",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-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:DEBIAN-CVE-2026-102277",
"products": [
{
"name": {
"value": "node-brace-expansion",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0.1+~1.1.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.0.1+~1.1.0-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.0.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.0.3+~1.1.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.0.3+~1.1.2-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.0.3+~1.1.2-3",
"evidence": "/affected/0/versions"
},
{
"value": "2.1.4+~1.1.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.1.7+~1.1.2-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "node-brace-expansion",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0.1+~1.1.0-2",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.3+~1.1.2-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.3+~1.1.2-2",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.3+~1.1.2-3",
"evidence": "/affected/1/versions"
},
{
"value": "2.1.4+~1.1.2-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.1.7+~1.1.2-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "node-brace-expansion",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.1.7+~1.1.2-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "2.0.1+~1.1.0-2",
"evidence": "/affected/2/versions"
},
{
"value": "2.0.3+~1.1.2-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.0.3+~1.1.2-2",
"evidence": "/affected/2/versions"
},
{
"value": "2.0.3+~1.1.2-3",
"evidence": "/affected/2/versions"
},
{
"value": "2.1.4+~1.1.2-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-102277",
"aliases": [
"DEBIAN-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"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-brace-expansion",
"purl": "pkg:deb/debian/node-brace-expansion?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.0.1+~1.1.0-1",
"2.0.1+~1.1.0-2",
"2.0.1-2",
"2.0.3+~1.1.2-1",
"2.0.3+~1.1.2-2",
"2.0.3+~1.1.2-3",
"2.1.4+~1.1.2-1",
"2.1.7+~1.1.2-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-102277.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-brace-expansion",
"purl": "pkg:deb/debian/node-brace-expansion?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2.0.1+~1.1.0-2",
"2.0.3+~1.1.2-1",
"2.0.3+~1.1.2-2",
"2.0.3+~1.1.2-3",
"2.1.4+~1.1.2-1",
"2.1.7+~1.1.2-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-102277.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.1.7+~1.1.2-1"
}
]
}
],
"package": {
"name": "node-brace-expansion",
"purl": "pkg:deb/debian/node-brace-expansion?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2.0.1+~1.1.0-2",
"2.0.3+~1.1.2-1",
"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://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-102277.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-09T17:00:11.465201275Z",
"provider": "osv",
"upstream": [
"CVE-2026-102277"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-102277"
]
},
"related_cves": [
{
"value": "CVE-2026-102277",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 122316,
"published_at": "2026-09-28T21:17:16.3+00:00"
}