Jenkins LTS 2.319.2 and earlier defines custom XStream converters that have not been updated to apply the protections for the vulnerability CVE-2021-43859 and allow unconstrained resource usage.
{
"severity": "High",
"cpes": [
"cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*",
"cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*"
]
}