HighFix available
ruby-nokogiri — security advisory
Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::NodeSet#[] (and its alias #slice) checked the requested index against the node set's bounds using a 32-bit-truncated copy of the index. A large negative index could pass the check and then be used at full width, reading outside the node set's storage. On CRuby this is an out-of-bounds read that typically crashes the process; on JRuby it is not memory-unsafe but returns an incorrect node. This vulnerability is fixed in 1.19.4.
- Products
- ruby-nokogiri
- Affected versions
- 1.13.10+dfsg-2, 1.14.2+dfsg-1, 1.14.3+dfsg-1, 1.14.3+dfsg-2, 1.15.4+dfsg-1, 1.16.0+dfsg-1, 1.16.0+dfsg-2, 1.16.2+dfsg-1, 1.16.4+dfsg-1, 1.17.2+dfsg-1~exp1, 1.18.10+dfsg-1, 1.18.10+dfsg-2, 1.18.10+dfsg-3, 1.18.2+dfsg-1, 1.19.1+dfsg-1, 1.19.3+dfsg-1, 1.19.4+dfsg-1
- Fixed versions
- 1.19.4+dfsg-1
- CVEs
- CVE-2026-57235
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 12:22 UTC · Revision 2
Source evidence
Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::NodeSet#[] (and its alias #slice) checked the requested index against the node set's bounds using a 32-bit-truncated copy of the index. A large negative index could pass the check and then be used at full width, reading outside the node set's storage. On CRuby this is an out-of-bounds read that typically crashes the process; on JRuby it is not memory-unsafe but returns an incorrect node. This vulnerability is fixed in 1.19.4.
osv:DEBIAN-CVE-2026-57235
ruby-nokogiri
Fixed versions: Not specified
ruby-nokogiri
Fixed versions: Not specified
ruby-nokogiri
Fixed versions: 1.19.4+dfsg-1
Complete source record
{
"id": "7af6e5b502b08dd683a55a3c53709c7d6854888ad91872e2fce28469b6d78592",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-57235",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-57235",
"summary": "Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::NodeSet#[] (and its alias #slice) checked the requested index against the node set's bounds using a 32-bit-truncated copy of the index. A large negative index could pass the check and then be used at full width, reading outside the node set's storage. On CRuby this is an out-of-bounds read that typically crashes the process; on JRuby it is not memory-unsafe but returns an incorrect node. This vulnerability is fixed in 1.19.4.",
"evidence": "osv:DEBIAN-CVE-2026-57235",
"products": [
{
"name": {
"value": "ruby-nokogiri",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.13.10+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.14.2+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.14.3+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.14.3+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.15.4+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.16.0+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.16.0+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.16.2+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.16.4+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.17.2+dfsg-1~exp1",
"evidence": "/affected/0/versions"
},
{
"value": "1.18.10+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.18.10+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.18.10+dfsg-3",
"evidence": "/affected/0/versions"
},
{
"value": "1.18.2+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.19.1+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.19.3+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.19.4+dfsg-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "ruby-nokogiri",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.18.10+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.18.10+dfsg-2",
"evidence": "/affected/1/versions"
},
{
"value": "1.18.10+dfsg-3",
"evidence": "/affected/1/versions"
},
{
"value": "1.18.2+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.19.1+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.19.3+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.19.4+dfsg-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "ruby-nokogiri",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.19.4+dfsg-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "1.18.10+dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.18.10+dfsg-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.18.10+dfsg-3",
"evidence": "/affected/2/versions"
},
{
"value": "1.18.2+dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.19.1+dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.19.3+dfsg-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2026-57235",
"aliases": [
"DEBIAN-CVE-2026-57235"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "ruby-nokogiri",
"purl": "pkg:deb/debian/ruby-nokogiri?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.13.10+dfsg-2",
"1.14.2+dfsg-1",
"1.14.3+dfsg-1",
"1.14.3+dfsg-2",
"1.15.4+dfsg-1",
"1.16.0+dfsg-1",
"1.16.0+dfsg-2",
"1.16.2+dfsg-1",
"1.16.4+dfsg-1",
"1.17.2+dfsg-1~exp1",
"1.18.10+dfsg-1",
"1.18.10+dfsg-2",
"1.18.10+dfsg-3",
"1.18.2+dfsg-1",
"1.19.1+dfsg-1",
"1.19.3+dfsg-1",
"1.19.4+dfsg-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-57235.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "ruby-nokogiri",
"purl": "pkg:deb/debian/ruby-nokogiri?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.18.10+dfsg-1",
"1.18.10+dfsg-2",
"1.18.10+dfsg-3",
"1.18.2+dfsg-1",
"1.19.1+dfsg-1",
"1.19.3+dfsg-1",
"1.19.4+dfsg-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-57235.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.19.4+dfsg-1"
}
]
}
],
"package": {
"name": "ruby-nokogiri",
"purl": "pkg:deb/debian/ruby-nokogiri?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.18.10+dfsg-1",
"1.18.10+dfsg-2",
"1.18.10+dfsg-3",
"1.18.2+dfsg-1",
"1.19.1+dfsg-1",
"1.19.3+dfsg-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-57235.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-26T11:47:35.897910063Z",
"provider": "osv",
"upstream": [
"CVE-2026-57235"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-57235"
]
},
"related_cves": [
{
"value": "CVE-2026-57235",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 450928,
"published_at": "2026-06-25T15:16:40.493+00:00"
}