GraphQL-core is a Python port of the GraphQL.js reference implementation. From 3.3.0a3 until 3.3.1, validate() reuses a module-level ValidationAbortedError when a document exceeds max_errors. Python appends frames to the reused exception's traceback on every raise, retaining each document, validation context, and error set for the process lifetime. An unauthenticated client can repeatedly submit a small document with more than 100 validation errors to cause unbounded memory growth before query execution, eventually exhausting worker memory without disclosing or modifying data. This issue is fixed in version 3.3.1.
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History

Thu, 29 Oct 2026 22:30:00 +0000

Type Values Removed Values Added
First Time appeared Graphql-python
Graphql-python graphql-core
Vendors & Products Graphql-python
Graphql-python graphql-core

Thu, 29 Oct 2026 21:45:00 +0000

Type Values Removed Values Added
Description GraphQL-core is a Python port of the GraphQL.js reference implementation. From 3.3.0a3 until 3.3.1, validate() reuses a module-level ValidationAbortedError when a document exceeds max_errors. Python appends frames to the reused exception's traceback on every raise, retaining each document, validation context, and error set for the process lifetime. An unauthenticated client can repeatedly submit a small document with more than 100 validation errors to cause unbounded memory growth before query execution, eventually exhausting worker memory without disclosing or modifying data. This issue is fixed in version 3.3.1.
Title GraphQL-core: Denial of service via memory leak in aborted validations
Weaknesses CWE-400
CWE-401
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-29T21:38:43.633Z

Reserved: 2026-10-29T18:50:28.065Z

Link: CVE-2026-119286

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-29T22:17:01.517

Modified: 2026-10-29T22:17:01.517

Link: CVE-2026-119286

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-29T22:15:03Z

Weaknesses