File path filters in the agent-to-controller security subsystem of Jenkins 2.318 and earlier, LTS 2.303.2 and earlier do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories.
{
"versions": [
{
"introduced": "0"
},
{
"fixed": "2.303.3"
},
{
"introduced": "0"
},
{
"fixed": "2.319"
}
]
}