ubuntu-cve-2026-73648
Vulnerability from osv_ubuntu
Published
2026-08-13 18:18
Modified
2026-08-19 11:11
Summary
Details
rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. From 1.0.3 until 1.7.1, Rails::HTML::PermitScrubber restricted SVG reference elements in SVG_ALLOW_LOCAL_HREF only when they used xlink:href, even though browsers also accept the plain href attribute. Applications with non-default allowed tags that included SVG use or feImage elements could therefore permit external references; a same-origin external SVG referenced by use could execute scripts in the sanitized document's context, while feImage could load external images for tracking. Applications using the default allowed tags are not affected. This issue is fixed in version 1.7.1.
Severity
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ruby-rails-html-sanitizer",
"binary_version": "1.0.3-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "ruby-rails-html-sanitizer",
"purl": "pkg:deb/ubuntu/ruby-rails-html-sanitizer@1.0.3-2?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.0.2-1",
"1.0.3-1",
"1.0.3-2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ruby-rails-html-sanitizer",
"binary_version": "1.0.4-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "ruby-rails-html-sanitizer",
"purl": "pkg:deb/ubuntu/ruby-rails-html-sanitizer@1.0.4-1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.0.3-2",
"1.0.4-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ruby-rails-html-sanitizer",
"binary_version": "1.3.0-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "ruby-rails-html-sanitizer",
"purl": "pkg:deb/ubuntu/ruby-rails-html-sanitizer@1.3.0-1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.0.4-1",
"1.3.0-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ruby-rails-html-sanitizer",
"binary_version": "1.4.2-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "ruby-rails-html-sanitizer",
"purl": "pkg:deb/ubuntu/ruby-rails-html-sanitizer@1.4.2-2?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.3.0-2",
"1.4.2-1",
"1.4.2-2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ruby-rails-html-sanitizer",
"binary_version": "1.4.4-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "ruby-rails-html-sanitizer",
"purl": "pkg:deb/ubuntu/ruby-rails-html-sanitizer@1.4.4-1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.4.4-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ruby-rails-html-sanitizer",
"binary_version": "1.6.2-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "ruby-rails-html-sanitizer",
"purl": "pkg:deb/ubuntu/ruby-rails-html-sanitizer@1.6.2-1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.6.2-1"
]
}
],
"aliases": [],
"details": "rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. From 1.0.3 until 1.7.1, Rails::HTML::PermitScrubber restricted SVG reference elements in SVG_ALLOW_LOCAL_HREF only when they used xlink:href, even though browsers also accept the plain href attribute. Applications with non-default allowed tags that included SVG use or feImage elements could therefore permit external references; a same-origin external SVG referenced by use could execute scripts in the sanitized document\u0027s context, while feImage could load external images for tracking. Applications using the default allowed tags are not affected. This issue is fixed in version 1.7.1.",
"id": "UBUNTU-CVE-2026-73648",
"modified": "2026-08-19T11:11:14Z",
"published": "2026-08-13T18:18:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-73648"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-73648"
},
{
"type": "REPORT",
"url": "https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-cj75-f6xr-r4g7"
},
{
"type": "REPORT",
"url": "https://github.com/rails/rails-html-sanitizer/pull/223"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-73648"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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