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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
References 5
https://github.com/graphql-python/graphql-core/commit/3c319fd9f4b8f6c9db4189520…
security-advisories@github.com
https://github.com/graphql-python/graphql-core/issues/287
security-advisories@github.com
https://github.com/graphql-python/graphql-core/pull/288
security-advisories@github.com
https://github.com/graphql-python/graphql-core/releases/tag/v3.3.1
security-advisories@github.com
https://github.com/graphql-python/graphql-core/security/advisories/GHSA-mpqx-q8…
security-advisories@github.com