Denial of Service Vulnerability in Hasura GraphQL by Hasura
CVE-2021-47713

8.7HIGH

Key Information:

Vendor

Hasura

Status
Hasura Graphql
Vendor
CVE Published:
22 December 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47713?

Hasura GraphQL version 1.3.3 is affected by a denial of service vulnerability that can allow attackers to exploit the service. By crafting malicious GraphQL queries with excessive nested fields, an attacker can send repeated requests featuring excessively long query strings and run multiple threads. This can lead to resource exhaustion on the server, potentially crashing the GraphQL endpoint, affecting availability and performance.

Affected Version(s)

Hasura GraphQL 1.3.3

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-47713 - Proof of Concept

References

https://www.exploit-db.com/exploits/49789
exploit
https://github.com/hasura/graphql-engine
product
https://www.vulncheck.com/advisories/hasura-graphql-denia...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Dolev Farhi
.