Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/graphql-python/graphql-core/commit/3c319fd9f4b8f6c9db41895205
- https://github.com/graphql-python/graphql-core/issues/287
- https://github.com/graphql-python/graphql-core/pull/288
- https://github.com/graphql-python/graphql-core/releases/tag/v3.3.1
- https://github.com/graphql-python/graphql-core/security/advisories/GHSA-mpqx-q82
FAQ
What is CVE-2026-119286?
CVE-2026-119286 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 a...
How severe is CVE-2026-119286?
CVE-2026-119286 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-119286?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.