A denial of service vulnerability exists in Jenkins 2.137 and earlier, 2.121.2 and earlier in BasicAuthenticationFilter.java, BasicHeaderApiTokenAuthenticator.java that allows attackers to create ephemeral in-memory user records by attempting to log in using invalid credentials.
{
"versions": [
{
"introduced": "0"
},
{
"last_affected": "2.121.2"
},
{
"introduced": "0"
},
{
"last_affected": "2.137"
}
]
}