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CVE Record

CVE-2026-23735: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in graphql-modules

GraphQL Modules is a toolset of libraries and guidelines dedicated to create reusable, maintainable, testable and extendable modules out of your GraphQL server. From 2.2.1 to before 2.4.1 and 3.1.1, when 2 or more parallel requests are made which trigger the same service, the context of the requests is mixed up in the service when the context is injected via @ExecutionContext(). ExecutionContext is often used to pass authentication tokens from incoming requests to services loading data from backend APIs. This vulnerability is fixed in 2.4.1 and 3.1.1.

HighCVSS 8.7Not KEV-listedUpdated
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2026-23735 is a race condition in graphql-modules that can mix request context between parallel GraphQL requests. If that context carries authentication tokens, one request may use another request’s token when calling backend services. This creates a high business risk for data integrity and authorization boundaries in affected GraphQL servers.

Executive priority

Treat as high priority for GraphQL applications using graphql-modules. The main concern is broken request isolation that could affect authorization decisions or backend API calls. Patch quickly where authentication context is injected into services.

Technical view

Affected graphql-modules versions are >=2.2.1 and <2.4.1, and >=3.0.0 and <3.1.1. When concurrent requests trigger the same service, context injected via @ExecutionContext() can be shared incorrectly. The CVSS 4.0 score is 8.7, with network attack vector and high integrity impact. Fixed versions are 2.4.1 and 3.1.1.

Likely exposure

Exposure is likely limited to applications using graphql-hive/graphql-modules in the affected version ranges, especially services using @ExecutionContext() to pass authentication or request-specific data into shared services.

Exploitation context

The source bundle does not indicate active exploitation, and KEV is false. Exploitation would require concurrent requests that trigger the same service and rely on request-specific injected context. The practical impact depends on what sensitive values the application stores in ExecutionContext.

Researcher notes

This is CWE-362, a synchronization flaw under parallel execution. Focus assessment on dependency version, use of @ExecutionContext(), service singleton/shared behavior, and whether tokens or tenant identifiers are injected. Public sources name fixed versions but do not provide evidence of real-world exploitation.

Mitigation direction

  • Upgrade graphql-modules to 2.4.1 or 3.1.1, according to your major version line.
  • Prioritize GraphQL services that pass authentication tokens through @ExecutionContext().
  • Review vendor advisory and release notes before deployment.
  • If immediate upgrade is blocked, check vendor guidance for supported temporary mitigations.

Validation and detection

  • Inventory package manifests and lockfiles for graphql-modules versions.
  • Identify use of @ExecutionContext() in services handling authentication or backend API calls.
  • Confirm production builds run 2.4.1, 3.1.1, or later.
  • Review tests for concurrent request handling and request-context isolation.
  • Monitor application logs for cross-user authorization anomalies.
Prepared
Confidence
high
Sources
6

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-362: Exact CWE lookup

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Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-23735 mapping review

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Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
High
CVSS
8.7 (4.0)
Known Exploited
No
Published

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
8.7CVSS 4.0HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N——Primary CVE score

Vulnerability scoring details

Base CVSS 4.0 score

8.7High
CVSS 4.0 vector shape for CVE-2026-23735Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone
Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
graphql-hivegraphql-modules>= 2.2.1, < 2.4.1, >= 3.0.0, < 3.1.1Listed
Weakness

CWE details

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-362 · source CWE mapping

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.