Medium
ruby-loofah — security advisory
Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Prior to 2.25.2, Loofah's HTML5 sanitizer applies its local-reference restriction only to the xlink:href attribute on SVG use and feImage elements, while browsers also accept the plain href attribute. A crafted sanitized SVG can therefore reference an arbitrary same-origin external document; use may render external SVG content containing scripts or other dangerous content, and feImage may load external images for tracking. Applications that sanitize user-supplied SVG with Loofah's default allowlist are affected. This issue is fixed in version 2.25.2.
- Products
- ruby-loofah
- Affected versions
- 2.0.2-1, 2.0.3-1, 2.0.3-2, 2.0.3-2+deb9u1build0.16.04.1, 2.0.3-2+deb9u2build0.16.04.1, 2.0.3-2+deb9u3build0.16.04.1, 2.12.0-1, 2.13.0-1, 2.13.0-2, 2.2.2-1, 2.2.3-1, 2.21.3-1, 2.21.4-1, 2.22.0-1, 2.24.1-1, 2.25.0-1, 2.25.1-2, 2.25.2-1, 2.3.1+dfsg-1, 2.4.0+dfsg-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-73490
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:15 UTC · Revision 1
Source evidence
Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Prior to 2.25.2, Loofah's HTML5 sanitizer applies its local-reference restriction only to the xlink:href attribute on SVG use and feImage elements, while browsers also accept the plain href attribute. A crafted sanitized SVG can therefore reference an arbitrary same-origin external document; use may render external SVG content containing scripts or other dangerous content, and feImage may load external images for tracking. Applications that sanitize user-supplied SVG with Loofah's default allowlist are affected. This issue is fixed in version 2.25.2.
osv:UBUNTU-CVE-2026-73490
ruby-loofah
Fixed versions: Not specified
ruby-loofah
Fixed versions: Not specified
ruby-loofah
Fixed versions: Not specified
ruby-loofah
Fixed versions: Not specified
ruby-loofah
Fixed versions: Not specified
ruby-loofah
Fixed versions: Not specified
ruby-loofah
Fixed versions: Not specified
Complete source record
{
"id": "d1895c727577f9981adcd883da647e4ff8102116fdca42421c25b5069f9629f0",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-73490",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-73490",
"summary": "Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Prior to 2.25.2, Loofah's HTML5 sanitizer applies its local-reference restriction only to the xlink:href attribute on SVG use and feImage elements, while browsers also accept the plain href attribute. A crafted sanitized SVG can therefore reference an arbitrary same-origin external document; use may render external SVG content containing scripts or other dangerous content, and feImage may load external images for tracking. Applications that sanitize user-supplied SVG with Loofah's default allowlist are affected. This issue is fixed in version 2.25.2.",
"evidence": "osv:UBUNTU-CVE-2026-73490",
"products": [
{
"name": {
"value": "ruby-loofah",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.0.3-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.0.3-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.0.3-2+deb9u1build0.16.04.1",
"evidence": "/affected/0/versions"
},
{
"value": "2.0.3-2+deb9u2build0.16.04.1",
"evidence": "/affected/0/versions"
},
{
"value": "2.0.3-2+deb9u3build0.16.04.1",
"evidence": "/affected/0/versions"
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]
},
{
"name": {
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"evidence": "/affected/1/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "2.0.3-2",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.2-1",
"evidence": "/affected/1/versions"
}
]
},
{
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"evidence": "/affected/2/package/name"
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"affected_versions": [
{
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"evidence": "/affected/2/versions"
},
{
"value": "2.3.1+dfsg-1",
"evidence": "/affected/2/versions"
},
{
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"evidence": "/affected/2/versions"
}
]
},
{
"name": {
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"evidence": "/affected/3/package/name"
},
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{
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"evidence": "/affected/3/versions"
},
{
"value": "2.13.0-1",
"evidence": "/affected/3/versions"
},
{
"value": "2.13.0-2",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
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"evidence": "/affected/4/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
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"evidence": "/affected/4/versions"
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{
"value": "2.21.4-1",
"evidence": "/affected/4/versions"
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{
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"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "ruby-loofah",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.25.0-1",
"evidence": "/affected/5/versions"
},
{
"value": "2.25.1-2",
"evidence": "/affected/5/versions"
},
{
"value": "2.25.2-1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "ruby-loofah",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.24.1-1",
"evidence": "/affected/6/versions"
},
{
"value": "2.25.0-1",
"evidence": "/affected/6/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-73490",
"aliases": [
"UBUNTU-CVE-2026-73490"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
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"purl": "pkg:deb/ubuntu/ruby-loofah?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"2.0.2-1",
"2.0.3-1",
"2.0.3-2",
"2.0.3-2+deb9u1build0.16.04.1",
"2.0.3-2+deb9u2build0.16.04.1",
"2.0.3-2+deb9u3build0.16.04.1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73490.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ruby-loofah",
"binary_version": "2.0.3-2+deb9u3build0.16.04.1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "ruby-loofah",
"purl": "pkg:deb/ubuntu/ruby-loofah?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"2.0.3-2",
"2.2.2-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73490.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ruby-loofah",
"binary_version": "2.2.2-1"
}
]
}
},
{
"ranges": [
{
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],
"package": {
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"purl": "pkg:deb/ubuntu/ruby-loofah?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"2.2.3-1",
"2.3.1+dfsg-1",
"2.4.0+dfsg-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73490.json"
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"ecosystem_specific": {
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{
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},
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},
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},
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],
"modified": "2026-10-17T13:01:03.056185888Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://ubuntu.com/security/CVE-2026-73490",
"https://www.cve.org/CVERecord?id=CVE-2026-73490",
"https://github.com/flavorjones/loofah/security/advisories/GHSA-9wjq-cp2p-hrgf",
"https://github.com/flavorjones/loofah/pull/308",
"https://github.com/flavorjones/loofah/commit/20867b9be689521887364b74822c41ef830523c9",
"https://github.com/flavorjones/loofah/releases/tag/v2.25.2"
]
},
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{
"value": "CVE-2026-73490",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 360903,
"published_at": "2026-08-12T21:17:00+00:00"
}