LowFix available
libxslt — security advisory
A flaw was found in the exsltFuncResultComp() function of libxslt, which handles EXSLT elements during stylesheet parsing. Due to improper type handling, the function may treat an XML document node as a regular XML element node, resulting in a type confusion. This can cause unexpected memory reads and potential crashes. While difficult to exploit, the flaw could lead to application instability or denial of service.
- Products
- libxslt
- Affected versions
- 1.1.35-1, 1.1.35-1+deb12u1, 1.1.35-1+deb12u2, 1.1.35-1+deb12u3, 1.1.35-1+deb12u4, 1.1.35-1.1, 1.1.35-1.2, 1.1.35-1.2+deb13u1, 1.1.35-1.2+deb13u2, 1.1.35-1.2+deb13u3, 1.1.35-2, 1.1.39-0exp1, 1.1.43-0.1, 1.1.43-0.2, 1.1.43-0.3, 1.1.43-0exp1, 1.1.45-0.1
- Fixed versions
- 1.1.43-0.3
- CVEs
- CVE-2025-11731
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 23:07 UTC · Revision 1
Source evidence
A flaw was found in the exsltFuncResultComp() function of libxslt, which handles EXSLT elements during stylesheet parsing. Due to improper type handling, the function may treat an XML document node as a regular XML element node, resulting in a type confusion. This can cause unexpected memory reads and potential crashes. While difficult to exploit, the flaw could lead to application instability or denial of service.
osv:DEBIAN-CVE-2025-11731
libxslt
Fixed versions: Not specified
libxslt
Fixed versions: Not specified
libxslt
Fixed versions: 1.1.43-0.3
Complete source record
{
"id": "0f6a4f64b07cbccb540286cc6238c2b41ae5e62c3fe25db6dffd82161b3f4f39",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2025-11731",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2025-11731",
"summary": "A flaw was found in the exsltFuncResultComp() function of libxslt, which handles EXSLT elements during stylesheet parsing. Due to improper type handling, the function may treat an XML document node as a regular XML element node, resulting in a type confusion. This can cause unexpected memory reads and potential crashes. While difficult to exploit, the flaw could lead to application instability or denial of service.",
"evidence": "osv:DEBIAN-CVE-2025-11731",
"products": [
{
"name": {
"value": "libxslt",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.1.35-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.1.35-1+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "1.1.35-1+deb12u2",
"evidence": "/affected/0/versions"
},
{
"value": "1.1.35-1+deb12u3",
"evidence": "/affected/0/versions"
},
{
"value": "1.1.35-1+deb12u4",
"evidence": "/affected/0/versions"
},
{
"value": "1.1.35-1.1",
"evidence": "/affected/0/versions"
},
{
"value": "1.1.35-1.2",
"evidence": "/affected/0/versions"
},
{
"value": "1.1.35-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.1.39-0exp1",
"evidence": "/affected/0/versions"
},
{
"value": "1.1.43-0.1",
"evidence": "/affected/0/versions"
},
{
"value": "1.1.43-0.2",
"evidence": "/affected/0/versions"
},
{
"value": "1.1.43-0.3",
"evidence": "/affected/0/versions"
},
{
"value": "1.1.43-0exp1",
"evidence": "/affected/0/versions"
},
{
"value": "1.1.45-0.1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "libxslt",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.1.35-1.2",
"evidence": "/affected/1/versions"
},
{
"value": "1.1.35-1.2+deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "1.1.35-1.2+deb13u2",
"evidence": "/affected/1/versions"
},
{
"value": "1.1.35-1.2+deb13u3",
"evidence": "/affected/1/versions"
},
{
"value": "1.1.35-2",
"evidence": "/affected/1/versions"
},
{
"value": "1.1.39-0exp1",
"evidence": "/affected/1/versions"
},
{
"value": "1.1.43-0.1",
"evidence": "/affected/1/versions"
},
{
"value": "1.1.43-0.2",
"evidence": "/affected/1/versions"
},
{
"value": "1.1.43-0.3",
"evidence": "/affected/1/versions"
},
{
"value": "1.1.43-0exp1",
"evidence": "/affected/1/versions"
},
{
"value": "1.1.45-0.1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "libxslt",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.1.43-0.3",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "1.1.35-1.2",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.35-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.39-0exp1",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.43-0.1",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.43-0.2",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.43-0exp1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "low",
"structured": {
"id": "DEBIAN-CVE-2025-11731",
"aliases": [
"DEBIAN-CVE-2025-11731"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libxslt",
"purl": "pkg:deb/debian/libxslt?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.1.35-1",
"1.1.35-1+deb12u1",
"1.1.35-1+deb12u2",
"1.1.35-1+deb12u3",
"1.1.35-1+deb12u4",
"1.1.35-1.1",
"1.1.35-1.2",
"1.1.35-2",
"1.1.39-0exp1",
"1.1.43-0.1",
"1.1.43-0.2",
"1.1.43-0.3",
"1.1.43-0exp1",
"1.1.45-0.1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-11731.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libxslt",
"purl": "pkg:deb/debian/libxslt?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.1.35-1.2",
"1.1.35-1.2+deb13u1",
"1.1.35-1.2+deb13u2",
"1.1.35-1.2+deb13u3",
"1.1.35-2",
"1.1.39-0exp1",
"1.1.43-0.1",
"1.1.43-0.2",
"1.1.43-0.3",
"1.1.43-0exp1",
"1.1.45-0.1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-11731.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.1.43-0.3"
}
]
}
],
"package": {
"name": "libxslt",
"purl": "pkg:deb/debian/libxslt?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.1.35-1.2",
"1.1.35-2",
"1.1.39-0exp1",
"1.1.43-0.1",
"1.1.43-0.2",
"1.1.43-0exp1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-11731.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-23T17:47:34.963450571Z",
"provider": "osv",
"upstream": [
"CVE-2025-11731"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2025-11731"
]
},
"related_cves": [
{
"value": "CVE-2025-11731",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 417750,
"published_at": "2025-10-14T06:15:34.483+00:00"
}