Apache CXF: Unsafe deserialization of inbound JMS ObjectMessage
Apache CXF's JMS transport deserializes the body of any inbound JMS ObjectMessage using native Java deserialization, with no type restrictions in place. Any attacker able to place a message on the service's JMS destination can submit a malicious serialized object, leading to denial of service or, if a suitable gadget class is on the classpath, remote code execution. The fix disables ObjectMessage deserialization by default, with a configuration switch to re-enable it if needed. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-66909
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 06:28 UTC · Revision 1
Source evidence
Apache CXF: Unsafe deserialization of inbound JMS ObjectMessage
core-osv · Original sourcePublished 6 Aug 2026, 10:23 UTC
Apache CXF's JMS transport deserializes the body of any inbound JMS ObjectMessage using native Java deserialization, with no type restrictions in place. Any attacker able to place a message on the service's JMS destination can submit a malicious serialized object, leading to denial of service or, if a suitable gadget class is on the classpath, remote code execution. The fix disables ObjectMessage deserialization by default, with a configuration switch to re-enable it if needed. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.
osv:CVE-2026-66909
Complete source record
{
"id": "218be5bb9ccdb423c576e5e69a598dcee8c69cdb395b2515f201dfd14282d4d0",
"url": "https://osv.dev/vulnerability/CVE-2026-66909",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Apache CXF: Unsafe deserialization of inbound JMS ObjectMessage",
"summary": "Apache CXF's JMS transport deserializes the body of any inbound JMS ObjectMessage using native Java deserialization, with no type restrictions in place. Any attacker able to place a message on the service's JMS destination can submit a malicious serialized object, leading to denial of service or, if a suitable gadget class is on the classpath, remote code execution. The fix disables ObjectMessage deserialization by default, with a configuration switch to re-enable it if needed. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.",
"evidence": "osv:CVE-2026-66909",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2026-66909",
"aliases": [
"CVE-2026-66909"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/apache/cxf",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "16d606b3c4d5c7d271fd3b488c60a208586acb3f"
},
{
"introduced": "02310e95fe74c0c031f540f3284e4a9bd856ced2"
},
{
"fixed": "8797a177ec23e9c578c78a630c154ad27d9bbe8d"
},
{
"introduced": "04ccbfd709eef8f4af53d6237514fbe9db7ea81f"
},
{
"fixed": "33259395b45b4ff69b8df6a153630721fdd489fa"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "3.6.12"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.0.0"
},
{
"fixed": "4.1.8"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.2.0"
},
{
"fixed": "4.2.3"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"cxf-4.1.7",
"cxf-4.2.2",
"cxf-3.6.11",
"cxf-4.1.6",
"cxf-4.2.1",
"cxf-3.6.10",
"cxf-4.1.5",
"cxf-4.2.0",
"cxf-3.6.9",
"cxf-4.1.4",
"cxf-3.6.8",
"cxf-4.1.3",
"cxf-3.6.7",
"cxf-4.1.2",
"cxf-3.6.6",
"cxf-4.1.1",
"cxf-4.1.0",
"cxf-3.6.5",
"cxf-3.6.4",
"cxf-3.6.3",
"cxf-4.0.4",
"cxf-4.0.3",
"cxf-3.6.2",
"cxf-4.0.2",
"cxf-3.6.1",
"cxf-4.0.1",
"cxf-3.6.0",
"cxf-4.0.0",
"cxf-3.5.0",
"cxf-3.4.1",
"cxf-3.4.0",
"cxf-3.3.3",
"cxf-3.3.2",
"cxf-3.3.1",
"cxf-3.3.0",
"cxf-3.2.5",
"cxf-3.2.4",
"cxf-3.2.3",
"cxf-3.2.2",
"cxf-3.2.1",
"cxf-3.2.0",
"cxf-3.1.4",
"cxf-3.1.3",
"cxf-3.1.2",
"cxf-3.1.1",
"cxf-3.1.0",
"cxf-3.0.0",
"cxf-3.0.0-milestone2",
"cxf-2.7.2",
"cxf-2.7.1",
"cxf-2.7.0",
"cxf-2.6.1",
"cxf-2.6.0",
"cxf-2.5.1",
"cxf-2.5.0",
"cxf-2.4.0",
"cxf-2.3.0",
"cxf-2.2.2",
"cxf-2.2.1",
"cxf-2.2",
"cxf-2.1.2",
"cxf-2.1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66909.json"
}
}
],
"modified": "2026-10-28T02:30:26.356735647Z",
"provider": "osv",
"references": [
"https://repo.maven.apache.org/maven2",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66909.json",
"https://lists.apache.org/thread/lr5d4tg6tf7j29jmw8wt242oowonjqpx",
"https://nvd.nist.gov/vuln/detail/CVE-2026-66909"
],
"provider_metadata": {
"cwe_ids": [
"CWE-502"
],
"cna_assigner": "apache",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"introduced": "4.2.0"
},
{
"fixed": "4.2.3"
},
{
"introduced": "4.0.0"
},
{
"fixed": "4.1.8"
},
{
"fixed": "3.6.12"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66909.json"
}
},
"related_cves": [
{
"value": "CVE-2026-66909",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 493052,
"published_at": "2026-08-06T10:23:23.571+00:00"
}