CVE-2021-47713Public exploitNetwork attack vector

Service crash via unbounded GraphQL field parsing

Published Dec 22, 2025 · Updated Dec 22, 2025

Resource exhaustion in Hasura GraphQL Engine 1.3.3 allows remote attackers to crash the GraphQL endpoint with crafted queries. The /v1/graphql handler parses an extremely long query containing one million repeated field selections without an effective resource limit. No authentication or user interaction is required, but the endpoint must be network-reachable and the referenced table must be queryable; concurrent requests consume service resources until availability is lost.

CVSS severity8.7
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Hasura GraphQL Engine 1.3.3 allows remote attackers to crash the GraphQL endpoint with crafted queries. The /v1/graphql handler parses an extremely long query containing one million repeated field selections without an effective resource limit. No authentication or user interaction is required, but the endpoint must be network-reachable and the referenced table must be queryable; concurrent requests consume service resources until availability is lost.

The record

CVE
CVE-2021-47713
Published
Dec 22, 2025
Updated
Dec 22, 2025
Vendor
Hasura
Product
Hasura GraphQL Engine
Classifications
CWE-770, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 22, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.3.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Hasura · Hasura GraphQL Engineversion=1.3.3

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.003Application Exhaustion Flood

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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