In Elasticsearch versions 6.0.0-beta1 to 6.2.4 a disclosure flaw was found in the _snapshot API. When the access_key and security_key parameters are set using the _snapshot API they can be exposed as plain text by users able to query the _snapshot API.
[
{
"product": "Elasticsearch",
"vendor": "Elastic",
"versions": [
{
"status": "affected",
"version": "6.0.0-beta1 to 6.2.4"
}
]
}
]