There is no restriction on the amount of attachment headers that a message can contain when being deserialized by Apache CXF, which can lead to uncontrolled resource consumption or a denial of service attack. Users are recommended to upgrade to versions 4.2.2 or 4.1.7 or 3.6.12, which fix this issue by imposing a maximum default of 500 attachments per message.
{
"unresolved_ranges": [
{
"source": "AFFECTED_FIELD",
"extracted_events": [
{
"introduced": "4.2.0"
},
{
"fixed": "4.2.2"
},
{
"introduced": "4.0.0"
},
{
"fixed": "4.1.7"
},
{
"fixed": "3.6.12"
}
]
}
],
"cna_assigner": "apache",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50645.json",
"cwe_ids": [
"CWE-400"
]
}{
"source": "CPE_RANGE",
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "4.1.7"
},
{
"introduced": "4.2.0"
},
{
"fixed": "4.2.2"
}
],
"cpe": "cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*"
}