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CVE-2026-40476

CVE-2026-40476 · graphql-php: Denial of Service via quadratic complexity in OverlappingFieldsCanBeMerged validation

This page contains facts from public vulnerability sources. Check the original advisory before updating.

graphql-go is a Go implementation of GraphQL. In versions 15.31.4 and below, the OverlappingFieldsCanBeMerged validation rule performs O(n²) pairwise comparisons of fields sharing the same response name. An attacker can send a query with thousands of repeated identical fields, causing excessive CPU usage during validation before execution begins. This is not mitigated by existing QueryDepth or QueryComplexity rules. This issue has been fixed in version 15.31.5.

CVSS 6.9 · Medium · EPSS 0.7% · Fix available

Published
Updated

Stack: php

Affected products and versions

  • graphql-php

    Versions
    • < 15.31.5: Affected

    No fix published

  • webonyx/graphql-php Packagist

    Versions
    • 14.10.0
    • v0.1
    • v0.10.0
    • v0.10.0-rc1
    • v0.10.1
    • v0.10.2
    • v0.11.0
    • v0.11.1
    • v0.11.2
    • v0.11.3
    • v0.11.4
    • v0.11.5
    • v0.11.6
    • v0.12.0
    • v0.12.1
    • v0.12.2
    • v0.12.3
    • v0.12.4
    • v0.12.5
    • v0.12.6
    • v0.13.0
    • v0.13.1
    • v0.13.2
    • v0.13.3
    • v0.13.4
    • v0.13.5
    • v0.13.6
    • v0.13.7
    • v0.13.8
    • v0.13.9
    • v0.2
    • v0.3
    • v0.4
    • v0.5
    • v0.5.1
    • v0.5.2
    • v0.5.3
    • v0.5.4
    • v0.5.5
    • v0.5.6
    • v0.5.7
    • v0.5.8
    • v0.5.9
    • v0.6.0
    • v0.6.1
    • v0.6.2
    • v0.6.3
    • v0.6.4
    • v0.7.0
    • v0.7.1
    • v0.7.2
    • v0.8.0
    • v0.9.0
    • v0.9.1
    • v0.9.10
    • v0.9.11
    • v0.9.12
    • v0.9.13
    • v0.9.14
    • v0.9.2
    • v0.9.3
    • v0.9.4
    • v0.9.5
    • v0.9.6
    • v0.9.7
    • v0.9.8
    • v0.9.9
    • v14.0.0
    • v14.0.1
    • v14.0.2
    • v14.1.0
    • v14.1.1
    • v14.11.0
    • v14.11.1
    • v14.11.10
    • v14.11.2
    • v14.11.3
    • v14.11.4
    • v14.11.5
    • v14.11.6
    • v14.11.7
    • v14.11.8
    • v14.11.9
    • v14.2.0
    • v14.3.0
    • v14.4.0
    • v14.4.1
    • v14.5.0
    • v14.5.1
    • v14.6.0
    • v14.6.1
    • v14.6.2
    • v14.6.3
    • v14.6.4
    • v14.7.0
    • v14.8.0
    • v14.9.0
    • v15.0.0
    • v15.0.0-alpha.1
    • v15.0.0-alpha.2
    • v15.0.0-beta.1
    • v15.0.1
    • v15.0.2
    • v15.0.3
    • v15.1.0
    • v15.10.0
    • v15.11.0
    • v15.11.1
    • v15.11.2
    • v15.12.0
    • v15.12.1
    • v15.12.2
    • v15.12.3
    • v15.12.4
    • v15.12.5
    • v15.13.0
    • v15.14.0
    • v15.14.1
    • v15.14.2
    • v15.14.3
    • v15.15.0
    • v15.16.0
    • v15.16.1
    • v15.17.0
    • v15.18.0
    • v15.18.1
    • v15.19.0
    • v15.19.1
    • v15.2.0
    • v15.2.1
    • v15.2.2
    • v15.2.3
    • v15.2.4
    • v15.2.5
    • v15.20.0
    • v15.20.1
    • v15.21.0
    • v15.21.1
    • v15.21.2
    • v15.21.3
    • v15.22.0
    • v15.22.1
    • v15.22.2
    • v15.22.3
    • v15.22.4
    • v15.23.0
    • v15.23.1
    • v15.24.0
    • v15.25.0
    • v15.25.1
    • v15.25.2
    • v15.26.0
    • v15.27.0
    • v15.27.1
    • v15.27.2
    • v15.28.0
    • v15.29.0
    • v15.29.1
    • v15.29.2
    • v15.29.3
    • v15.29.4
    • v15.3.0
    • v15.3.1
    • v15.3.2
    • v15.30.0
    • v15.30.1
    • v15.30.2
    • v15.31.0
    • v15.31.1
    • v15.31.2
    • v15.31.3
    • v15.31.4
    • v15.4.0
    • v15.5.0
    • v15.5.1
    • v15.5.2
    • v15.5.3
    • v15.6.0
    • v15.6.1
    • v15.6.2
    • v15.6.3
    • v15.7.0
    • v15.8.0
    • v15.8.1
    • v15.9.0
    • v15.9.1
    Affected ranges
    • ECOSYSTEM: < 15.31.5

    Update to 15.31.5

Original sources

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