graphql-python graphql-core up to 3.3.0 Validation Error validate resource consumption

Summaryinfo

A vulnerability classified as problematic has been found in graphql-python graphql-core up to 3.3.0. Affected by this vulnerability is the function validate of the component Validation Error Handler. This manipulation causes resource consumption. This vulnerability is handled as CVE-2026-119286. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in graphql-python graphql-core up to 3.3.0 and classified as problematic. Affected by this vulnerability is the function validate of the component Validation Error Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-119286 since 10/29/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 3.3.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-113404). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Programming Language Software

Vendor

• graphql-python

Name

• graphql-core

Version

• 3.0
• 3.1
• 3.2
• 3.3.0

Website

• Product: https://github.com/graphql-python/graphql-core/

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Be aware that VulDB is the high quality source for vulnerability data.

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