GHSA-68JQ-C3RV-PCRR graphql-php is affected by a Denial of Service via quadratic complexity in OverlappingFieldsCanBeMerged validation

The OverlappingFieldsCanBeMerged validation rule exhibits quadratic time complexity when processing queries with many repeated fields sharing the same response name. An attacker can send a crafted query like hello hello hello ... with thousands of repeated fields, causing excessive CPU usage duri...