CVE-2026-10802Public exploitNetwork attack vector

GraphQL service hang via unbounded nested queries

Published Jun 4, 2026 · Updated Jun 4, 2026

Uncontrolled resource consumption in Keystone 20260319 allows remote authenticated users to hang its GraphQL API with nested queries. The output-field resolver expands deeply nested circular relationships without depth, complexity, or cost limits, causing exponential database requests. A reachable relationship query is required; allowAll deployments also expose the hang to unauthenticated remote attackers.

CVSS severity4.3
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Keystone 20260319 allows remote authenticated users to hang its GraphQL API with nested queries. The output-field resolver expands deeply nested circular relationships without depth, complexity, or cost limits, causing exponential database requests. A reachable relationship query is required; allowAll deployments also expose the hang to unauthenticated remote attackers.

The record

CVE
CVE-2026-10802
Published
Jun 4, 2026
Updated
Jun 4, 2026
Vendor
KeystoneJS
Product
Keystone
Classifications
CWE-404, CWE-400, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 4, 2026Record 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=20260319

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

KeystoneJS · Keystoneversion=20260319

Published CVSS scores

2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
4.0VulDBAV:N/AC:L/Au:S/C:N/I:N/A:P
4.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-404Improper Resource Shutdown or Release
CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

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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