MediumFix available
libnginx-mod-js — security advisory
Description NGINX JavaScript (njs) has a vulnerability where the built-in njs engine leaks a libxml2 parser context when xml.parse() fails. The failure path did not register cleanup and the context was not released for the lifetime of the process. An unauthenticated attacker may send requests with malformed XML and can cause unbounded memory growth in long-lived NGINX worker processes. Impact This vulnerability may allow remote attackers to send requests that trigger repeated parsing of malformed XML and may lead to NGINX worker termination or denial of service. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
- Products
- libnginx-mod-js
- Affected versions
- 0.7.12-1, 0.7.12-2, 0.7.12-2~exp1, 0.7.12-2~exp2, 0.7.9-2, 0.8.0-1, 0.8.1-1, 0.8.2-1, 0.8.4-1, 0.8.5-1, 0.8.9-1, 0.9.1-1, 0.9.4-1, 0.9.6-1, 0.9.8-1, 0.9.9-1, 0.9.9-2, 1.0.0-1, 1.0.0-2, 1.0.0-3, 1.0.0-4, 1.0.1-1, 1.0.2-1, 1.0.2-2
- Fixed versions
- 1.0.2-1
- CVEs
- CVE-2026-101025
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 03:39 UTC · Revision 1
Source evidence
Description NGINX JavaScript (njs) has a vulnerability where the built-in njs engine leaks a libxml2 parser context when xml.parse() fails. The failure path did not register cleanup and the context was not released for the lifetime of the process. An unauthenticated attacker may send requests with malformed XML and can cause unbounded memory growth in long-lived NGINX worker processes. Impact This vulnerability may allow remote attackers to send requests that trigger repeated parsing of malformed XML and may lead to NGINX worker termination or denial of service. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
osv:DEBIAN-CVE-2026-101025
libnginx-mod-js
Fixed versions: Not specified
libnginx-mod-js
Fixed versions: Not specified
libnginx-mod-js
Fixed versions: 1.0.2-1
Complete source record
{
"id": "c6f4a8628b9396205a2e280ded269d92add1dcd2cbc4a7bd2c0a0d80e6fe2e8c",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-101025",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-101025",
"summary": "Description NGINX JavaScript (njs) has a vulnerability where the built-in njs engine leaks a libxml2 parser context when xml.parse() fails. The failure path did not register cleanup and the context was not released for the lifetime of the process. An unauthenticated attacker may send requests with malformed XML and can cause unbounded memory growth in long-lived NGINX worker processes. Impact This vulnerability may allow remote attackers to send requests that trigger repeated parsing of malformed XML and may lead to NGINX worker termination or denial of service. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.",
"evidence": "osv:DEBIAN-CVE-2026-101025",
"products": [
{
"name": {
"value": "libnginx-mod-js",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.7.12-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.7.12-2",
"evidence": "/affected/0/versions"
},
{
"value": "0.7.12-2~exp1",
"evidence": "/affected/0/versions"
},
{
"value": "0.7.12-2~exp2",
"evidence": "/affected/0/versions"
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{
"value": "0.7.9-2",
"evidence": "/affected/0/versions"
},
{
"value": "0.8.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.8.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.8.2-1",
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{
"value": "0.8.4-1",
"evidence": "/affected/0/versions"
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{
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{
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{
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{
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{
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{
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{
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},
{
"value": "0.9.9-2",
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{
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"evidence": "/affected/0/versions"
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{
"value": "1.0.0-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.0.0-3",
"evidence": "/affected/0/versions"
},
{
"value": "1.0.0-4",
"evidence": "/affected/0/versions"
},
{
"value": "1.0.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.0.2-1",
"evidence": "/affected/0/versions"
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{
"value": "1.0.2-2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
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},
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{
"value": "0.8.9-1",
"evidence": "/affected/1/versions"
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{
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"evidence": "/affected/1/versions"
},
{
"value": "0.9.4-1",
"evidence": "/affected/1/versions"
},
{
"value": "0.9.6-1",
"evidence": "/affected/1/versions"
},
{
"value": "0.9.8-1",
"evidence": "/affected/1/versions"
},
{
"value": "0.9.9-1",
"evidence": "/affected/1/versions"
},
{
"value": "0.9.9-2",
"evidence": "/affected/1/versions"
},
{
"value": "1.0.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.0.0-2",
"evidence": "/affected/1/versions"
},
{
"value": "1.0.0-3",
"evidence": "/affected/1/versions"
},
{
"value": "1.0.0-4",
"evidence": "/affected/1/versions"
},
{
"value": "1.0.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.0.2-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.0.2-2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "libnginx-mod-js",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.0.2-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "0.8.9-1",
"evidence": "/affected/2/versions"
},
{
"value": "0.9.1-1",
"evidence": "/affected/2/versions"
},
{
"value": "0.9.4-1",
"evidence": "/affected/2/versions"
},
{
"value": "0.9.6-1",
"evidence": "/affected/2/versions"
},
{
"value": "0.9.8-1",
"evidence": "/affected/2/versions"
},
{
"value": "0.9.9-1",
"evidence": "/affected/2/versions"
},
{
"value": "0.9.9-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.0.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.0.0-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.0.0-3",
"evidence": "/affected/2/versions"
},
{
"value": "1.0.0-4",
"evidence": "/affected/2/versions"
},
{
"value": "1.0.1-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-101025",
"aliases": [
"DEBIAN-CVE-2026-101025"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libnginx-mod-js",
"purl": "pkg:deb/debian/libnginx-mod-js?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"0.7.12-1",
"0.7.12-2",
"0.7.12-2~exp1",
"0.7.12-2~exp2",
"0.7.9-2",
"0.8.0-1",
"0.8.1-1",
"0.8.2-1",
"0.8.4-1",
"0.8.5-1",
"0.8.9-1",
"0.9.1-1",
"0.9.4-1",
"0.9.6-1",
"0.9.8-1",
"0.9.9-1",
"0.9.9-2",
"1.0.0-1",
"1.0.0-2",
"1.0.0-3",
"1.0.0-4",
"1.0.1-1",
"1.0.2-1",
"1.0.2-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-101025.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libnginx-mod-js",
"purl": "pkg:deb/debian/libnginx-mod-js?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"0.8.9-1",
"0.9.1-1",
"0.9.4-1",
"0.9.6-1",
"0.9.8-1",
"0.9.9-1",
"0.9.9-2",
"1.0.0-1",
"1.0.0-2",
"1.0.0-3",
"1.0.0-4",
"1.0.1-1",
"1.0.2-1",
"1.0.2-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-101025.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.0.2-1"
}
]
}
],
"package": {
"name": "libnginx-mod-js",
"purl": "pkg:deb/debian/libnginx-mod-js?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"0.8.9-1",
"0.9.1-1",
"0.9.4-1",
"0.9.6-1",
"0.9.8-1",
"0.9.9-1",
"0.9.9-2",
"1.0.0-1",
"1.0.0-2",
"1.0.0-3",
"1.0.0-4",
"1.0.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-101025.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-24T05:00:09.249577798Z",
"provider": "osv",
"upstream": [
"CVE-2026-101025"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-101025"
]
},
"related_cves": [
{
"value": "CVE-2026-101025",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 428196,
"published_at": "2026-10-14T15:17:01.88+00:00"
}