GHSA-fc86-6rv6-2jpm
High · 7.5webonyx/graphql-php has quadratic validation cost in OverlappingFieldsCanBeMerged via inline fragments
CVSS
7.5
EPSS
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Published
May 4, 2026
CISA due date
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The record
`OverlappingFieldsCanBeMerged` validation rule has `O(n^2 x m^2)` worst case via flattened inline fragments. The CVE-2023-26144 named-fragment cache does not cover inline fragments. A 364 KB query (200 outer x 100 inner inline fragments) consumes 117 seconds of CPU per request, with no comparison budget and no validation timeout.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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