High
node-n3 — security advisory
N3.js before 2.11.1 contains a regular expression denial of service vulnerability in the N3Lexer number pattern that backtracks quadratically on long digit runs. Attackers can supply untrusted Turtle or N3 input containing long runs of digits that do not end a number, blocking the Node.js event loop and causing denial of service.
- Products
- node-n3
- Affected versions
- 1.0.4-1, 1.0.4-3, 1.13.0+~1.2.3+~1.10.4-1, 1.16.3+~1.2.3+~1.10.4-1, 1.16.3+~1.2.3+~1.10.4-2, 1.16.3+~1.2.3+~1.10.4-3
- Fixed versions
- Not specified
- CVEs
- CVE-2026-109563
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:54 UTC · Revision 1
Source evidence
N3.js before 2.11.1 contains a regular expression denial of service vulnerability in the N3Lexer number pattern that backtracks quadratically on long digit runs. Attackers can supply untrusted Turtle or N3 input containing long runs of digits that do not end a number, blocking the Node.js event loop and causing denial of service.
osv:UBUNTU-CVE-2026-109563
node-n3
Fixed versions: Not specified
node-n3
Fixed versions: Not specified
node-n3
Fixed versions: Not specified
node-n3
Fixed versions: Not specified
node-n3
Fixed versions: Not specified
Complete source record
{
"id": "b185d2ba31fb44d24f4850a77136bb073eead77016805a31adc7eb839a6fda51",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-109563",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-109563",
"summary": "N3.js before 2.11.1 contains a regular expression denial of service vulnerability in the N3Lexer number pattern that backtracks quadratically on long digit runs. Attackers can supply untrusted Turtle or N3 input containing long runs of digits that do not end a number, blocking the Node.js event loop and causing denial of service.",
"evidence": "osv:UBUNTU-CVE-2026-109563",
"products": [
{
"name": {
"value": "node-n3",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.0.4-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
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"evidence": "/affected/1/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "1.0.4-3",
"evidence": "/affected/1/versions"
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{
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"evidence": "/affected/1/versions"
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{
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},
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{
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"affected_versions": [
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"evidence": "/affected/3/versions"
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},
{
"name": {
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"evidence": "/affected/4/package/name"
},
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"affected_versions": [
{
"value": "1.16.3+~1.2.3+~1.10.4-1",
"evidence": "/affected/4/versions"
},
{
"value": "1.16.3+~1.2.3+~1.10.4-2",
"evidence": "/affected/4/versions"
},
{
"value": "1.16.3+~1.2.3+~1.10.4-3",
"evidence": "/affected/4/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-109563",
"aliases": [
"UBUNTU-CVE-2026-109563"
],
"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-n3",
"purl": "pkg:deb/ubuntu/node-n3?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
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],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109563.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libjs-n3",
"binary_version": "1.0.4-1"
},
{
"binary_name": "node-n3",
"binary_version": "1.0.4-1"
}
]
}
},
{
"ranges": [
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],
"package": {
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"purl": "pkg:deb/ubuntu/node-n3?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"1.0.4-3",
"1.13.0+~1.2.3+~1.10.4-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109563.json"
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"package": {
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"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
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],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109563.json"
},
"ecosystem_specific": {
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{
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},
{
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"package": {
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"purl": "pkg:deb/ubuntu/node-n3?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
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],
"database_specific": {
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},
"ecosystem_specific": {
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"package": {
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"purl": "pkg:deb/ubuntu/node-n3?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"1.16.3+~1.2.3+~1.10.4-1",
"1.16.3+~1.2.3+~1.10.4-2",
"1.16.3+~1.2.3+~1.10.4-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109563.json"
},
"ecosystem_specific": {
"binaries": [
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"binary_name": "libjs-n3",
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{
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]
}
}
],
"modified": "2026-10-17T12:59:50.065694576Z",
"provider": "osv",
"upstream": [
"CVE-2026-109563"
],
"references": [
"https://ubuntu.com/security/CVE-2026-109563",
"https://www.cve.org/CVERecord?id=CVE-2026-109563",
"https://github.com/rdfjs/N3.js",
"https://github.com/rdfjs/N3.js/commit/b1c497fddb02c4772d61916bd2634115f45f424d",
"https://github.com/rdfjs/N3.js/pull/760",
"https://www.vulncheck.com/advisories/n3-js-before-2.11.1-redos-via-n3lexer-numeric-literal-regex"
]
},
"related_cves": [
{
"value": "CVE-2026-109563",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 359818,
"published_at": "2026-10-12T21:17:00+00:00"
}