Geth (aka go-ethereum) through 1.13.4, when --http --graphql is used, allows remote attackers to cause a denial of service (memory consumption and daemon hang) via a crafted GraphQL query.

NOTE: the vendor's position is that the "graphql endpoint [is not] designed to withstand attacks by hostile clients, nor handle huge amounts of clients/traffic.

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-42319
• https://blog.mevsec.com/posts/geth-dos-with-graphql/
• https://geth.ethereum.org/docs/fundamentals/security