UBUNTU-CVE-2026-57437 (CVE-2026-57437)
Vulnerability from osv_ubuntu – Published: 2026-06-25 15:16 – Updated: 2026-06-29 21:23 – Source website
VLAI
Details
Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::XPathContext did not keep its source document alive for garbage collection. If an XPathContext outlived its document and the document was collected, evaluating an XPath expression could read invalid memory and potentially segfault. This is only reachable when application code constructs an XPathContext directly and lets the document become unreachable while continuing to use the context. The normal Document#xpath, #css, and related search methods are not affected, and it is not triggerable by malicious document input. This vulnerability is fixed in 1.19.4.
Severity
5.3 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ruby-nokogiri",
"binary_version": "1.6.1+ds-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "ruby-nokogiri",
"purl": "pkg:deb/ubuntu/ruby-nokogiri@1.6.1+ds-1ubuntu0.1~esm1?arch=source\u0026distro=esm-infra-legacy/trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.5.9-2",
"1.5.9-3",
"1.6.0-1",
"1.6.1+ds-1",
"1.6.1+ds-1ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ruby-nokogiri",
"binary_version": "1.6.7.2-3ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "ruby-nokogiri",
"purl": "pkg:deb/ubuntu/ruby-nokogiri@1.6.7.2-3ubuntu0.1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.6.6.2+ds-2build2",
"1.6.6.3-1",
"1.6.7-1",
"1.6.7.1-1",
"1.6.7.2-3",
"1.6.7.2-3build1",
"1.6.7.2-3ubuntu0.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ruby-nokogiri",
"binary_version": "1.8.2-1ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "ruby-nokogiri",
"purl": "pkg:deb/ubuntu/ruby-nokogiri@1.8.2-1ubuntu0.1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
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}
],
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],
"versions": [
"1.8.0-1",
"1.8.1-1",
"1.8.1-1build1",
"1.8.2-1build1",
"1.8.2-1ubuntu0.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ruby-nokogiri",
"binary_version": "1.10.7+dfsg1-2ubuntu0.1~esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "ruby-nokogiri",
"purl": "pkg:deb/ubuntu/ruby-nokogiri@1.10.7+dfsg1-2ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
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],
"versions": [
"1.10.3+dfsg1-2",
"1.10.4+dfsg1-1",
"1.10.7+dfsg1-1",
"1.10.7+dfsg1-2",
"1.10.7+dfsg1-2build1",
"1.10.7+dfsg1-2ubuntu0.1~esm2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ruby-nokogiri",
"binary_version": "1.13.1+dfsg-2ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "ruby-nokogiri",
"purl": "pkg:deb/ubuntu/ruby-nokogiri@1.13.1+dfsg-2ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
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{
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}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.11.1+dfsg-2ubuntu1",
"1.11.7+dfsg-3",
"1.11.7+dfsg-3build1",
"1.13.1+dfsg-2",
"1.13.1+dfsg-2ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ruby-nokogiri",
"binary_version": "1.16.2+dfsg-1build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "ruby-nokogiri",
"purl": "pkg:deb/ubuntu/ruby-nokogiri@1.16.2+dfsg-1build1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.14.3+dfsg-2",
"1.16.2+dfsg-1",
"1.16.2+dfsg-1build1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ruby-nokogiri",
"binary_version": "1.18.2+dfsg-1build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "ruby-nokogiri",
"purl": "pkg:deb/ubuntu/ruby-nokogiri@1.18.2+dfsg-1build1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.16.4+dfsg-1build1",
"1.18.2+dfsg-1build1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ruby-nokogiri",
"binary_version": "1.18.10+dfsg-3"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "ruby-nokogiri",
"purl": "pkg:deb/ubuntu/ruby-nokogiri@1.18.10+dfsg-3?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.18.2+dfsg-1build1",
"1.18.10+dfsg-2",
"1.18.10+dfsg-3"
]
}
],
"aliases": [],
"details": "Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::XPathContext did not keep its source document alive for garbage collection. If an XPathContext outlived its document and the document was collected, evaluating an XPath expression could read invalid memory and potentially segfault. This is only reachable when application code constructs an XPathContext directly and lets the document become unreachable while continuing to use the context. The normal Document#xpath, #css, and related search methods are not affected, and it is not triggerable by malicious document input. This vulnerability is fixed in 1.19.4.",
"id": "UBUNTU-CVE-2026-57437",
"modified": "2026-06-29T21:23:38Z",
"published": "2026-06-25T15:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-57437"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-57437"
},
{
"type": "REPORT",
"url": "https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-p67v-3w7g-wjg7"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear",
"type": "CVSS_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-57437"
]
}
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Sightings
| Author | Source | Type | Date | Other |
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Nomenclature
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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.
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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