Resource Exhaustion Affecting graphql-core package, versions <3.2.12-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-GRAPHQLCORE-21479308
- published23 Oct 2026
- disclosed22 Oct 2026
Introduced: 22 Oct 2026
NewCVE-2026-75507 (opens in a new tab)How to fix?
Upgrade Debian:unstable graphql-core to version 3.2.12-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream graphql-core package and not the graphql-core package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2026-75507
- https://github.com/graphql-python/graphql-core/commit/150e59814d97d12140be005a558c93188ef89198
- https://github.com/graphql-python/graphql-core/commit/29c2753a7ee30a96a4109e7c6add1a2dae0497d7
- https://github.com/graphql-python/graphql-core/releases/tag/v3.2.12
- https://github.com/graphql-python/graphql-core/releases/tag/v3.3.0rc1
- https://github.com/graphql-python/graphql-core/security/advisories/GHSA-vj8h-fx38-h3vc