A flaw was discovered in Elasticsearch, affecting document ingestion when an index template contains a dynamic field mapping of “passthrough” type. Under certain circumstances, ingesting documents in this index would cause a StackOverflow exception to be thrown and ultimately lead to a Denial of Service. Note that passthrough fields is an experimental feature.
{ "cpes": [ "cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*", "cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:maven:*:*" ], "severity": "Medium" }