Critical
wss4j — security advisory
In the StAX streaming WS-SecurityPolicy validator, certain relative or unsupported XPath expressions can be converted into paths that never match the actual XML element path. A remote SOAP peer may therefore send a required element without the expected signature or encryption. Users are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.
- Products
- wss4j
- Affected versions
- 1.6.15-2, 1.6.19-1, 1.6.19-2, 1.6.19-3, 1.6.19-4, 1.6.19-4build1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-87830
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:29 UTC · Revision 1
Source evidence
In the StAX streaming WS-SecurityPolicy validator, certain relative or unsupported XPath expressions can be converted into paths that never match the actual XML element path. A remote SOAP peer may therefore send a required element without the expected signature or encryption. Users are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.
osv:UBUNTU-CVE-2026-87830
wss4j
Fixed versions: Not specified
wss4j
Fixed versions: Not specified
wss4j
Fixed versions: Not specified
wss4j
Fixed versions: Not specified
wss4j
Fixed versions: Not specified
wss4j
Fixed versions: Not specified
wss4j
Fixed versions: Not specified
Complete source record
{
"id": "f80ebdb5a69fafd5a54453c5827fd3046362f9b7853af19d47a2936b2716918c",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-87830",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-87830",
"summary": "In the StAX streaming WS-SecurityPolicy validator, certain relative or unsupported XPath expressions can be converted into paths that never match the actual XML element path. A remote SOAP peer may therefore send a required element without the expected signature or encryption. Users are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.",
"evidence": "osv:UBUNTU-CVE-2026-87830",
"products": [
{
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"evidence": "/affected/0/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "1.6.15-2",
"evidence": "/affected/0/versions"
}
]
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{
"name": {
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{
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{
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{
"name": {
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"evidence": "/affected/5/package/name"
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"affected_versions": [
{
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{
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},
"prerequisites": [],
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"affected_versions": [
{
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"evidence": "/affected/6/versions"
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{
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"evidence": "/affected/6/versions"
}
]
}
],
"severity": "critical",
"structured": {
"id": "UBUNTU-CVE-2026-87830",
"aliases": [
"UBUNTU-CVE-2026-87830"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
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"events": [
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"introduced": "0"
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"package": {
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"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
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],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87830.json"
},
"ecosystem_specific": {
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},
{
"ranges": [
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],
"package": {
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"purl": "pkg:deb/ubuntu/wss4j?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"1.6.19-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87830.json"
},
"ecosystem_specific": {
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"database_specific": {
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"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
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],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87830.json"
},
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"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
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],
"database_specific": {
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},
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},
"versions": [
"1.6.19-4build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87830.json"
},
"ecosystem_specific": {
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{
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"package": {
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"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
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"1.6.19-4build1"
],
"database_specific": {
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},
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}
],
"modified": "2026-10-17T13:01:15.000308008Z",
"provider": "osv",
"upstream": [
"CVE-2026-87830"
],
"references": [
"https://ubuntu.com/security/CVE-2026-87830",
"https://www.cve.org/CVERecord?id=CVE-2026-87830",
"https://lists.apache.org/thread.html/lwlozb1x20d16f9dnyvoygc9rrhzq2vn"
]
},
"related_cves": [
{
"value": "CVE-2026-87830",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 361374,
"published_at": "2026-09-30T12:17:00+00:00"
}