AIKIDO-2026-253771
graphql-core is vulnerable to Denial of Service (DoS)
75
High Risk
This Affects:
graphql-coreTL;DR
The OverlappingFieldsCanBeMerged validation rule compares selected fields to detect merge conflicts before any resolver runs. On documents with many nested inline fragments the number of comparisons grows quadratically, so a small query drives the rule into extreme running time. Untrusted queries can therefore exhaust CPU during validation and deny service without authentication. The fix enforces a per-document comparison budget that aborts validation with an error once the limit is exceeded.
Who does this affect?
You are affected if you run a version that falls within the vulnerable range and your application validates GraphQL queries from untrusted input.
Background info
graphql-core is vulnerable to Denial of Service (DoS) in versions 3.0.0 - 3.2.11.
How to fix this
Upgrade the graphql-core library to the patch version.
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