Description

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.

INFO

Published Date :

2026-04-17T21:42:59.511Z

Last Modified :

2026-04-20T14:56:57.812Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-40476 vulnerability.

Vendors Products
Webonyx
  • Graphql-php
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-40476.

URL Resource
https://github.com/webonyx/graphql-php/releases/tag/v15.31.5 cve-icon cve-icon
https://github.com/webonyx/graphql-php/security/advisories/GHSA-68jq-c3rv-pcrr cve-icon cve-icon
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