CVE-2026-75507
Full vulnerability record from the local CVENow database.
Description
GraphQL-core is a Python port of the GraphQL.js reference implementation. From 3.0.0 until 3.2.12 and 3.3.0rc1, the OverlappingFieldsCanBeMerged rule in specified_rules repeatedly compares fields that share response names and recursively re-compares flattened inline fragments during the validation phase. The prior named-fragment memoization does not cover this path, so nested repeated inline fragments can drive quadratic and worst-case O(n²·m²) CPU work before any resolver or AST-based depth or complexity control runs. An unauthenticated remote attacker can submit a shallow, highly compressible GraphQL query that pins a worker process and can saturate a multi-worker service. This issue is fixed in versions 3.2.12 and 3.3.0rc1.
View original CVE JSON
{
"id": "CVE-2026-75507",
"sourceIdentifier": "[email protected]",
"published": "2026-10-22T17:16:59.757",
"lastModified": "2026-10-23T22:17:00.110",
"vulnStatus": "Deferred",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "GraphQL-core is a Python port of the GraphQL.js reference implementation. From 3.0.0 until 3.2.12 and 3.3.0rc1, the OverlappingFieldsCanBeMerged rule in specified_rules repeatedly compares fields that share response names and recursively re-compares flattened inline fragments during the validation phase. The prior named-fragment memoization does not cover this path, so nested repeated inline fragments can drive quadratic and worst-case O(n²·m²) CPU work before any resolver or AST-based depth or complexity control runs. An unauthenticated remote attacker can submit a shallow, highly compressible GraphQL query that pins a worker process and can saturate a multi-worker service. This issue is fixed in versions 3.2.12 and 3.3.0rc1."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "graphql-python",
"product": "graphql-core",
"versions": [
{
"version": ">= 3.0.0, < 3.2.12",
"status": "affected"
},
{
"version": ">= 3.3.0a1, < 3.3.0rc1",
"status": "affected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-10-23T17:32:54.760212Z",
"id": "CVE-2026-75507",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-400"
},
{
"lang": "en",
"value": "CWE-407"
}
]
}
],
"references": [
{
"url": "https://github.com/graphql-python/graphql-core/commit/150e59814d97d12140be005a558c93188ef89198",
"source": "[email protected]"
},
{
"url": "https://github.com/graphql-python/graphql-core/commit/29c2753a7ee30a96a4109e7c6add1a2dae0497d7",
"source": "[email protected]"
},
{
"url": "https://github.com/graphql-python/graphql-core/releases/tag/v3.2.12",
"source": "[email protected]"
},
{
"url": "https://github.com/graphql-python/graphql-core/releases/tag/v3.3.0rc1",
"source": "[email protected]"
},
{
"url": "https://github.com/graphql-python/graphql-core/security/advisories/GHSA-vj8h-fx38-h3vc",
"source": "[email protected]"
}
]
}