CVE-2026-119286 GraphQL-core: Denial of service via memory leak in aborted validations
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-119286?
CVE-2026-119286 is a high-severity vulnerability in graphql-python graphql-core, published on 29 Oct 2026.
Official 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.
Which versions are affected by CVE-2026-119286?
How do I fix CVE-2026-119286?
No fix has been published for CVE-2026-119286 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-119286 being exploited?
There is no known exploitation of CVE-2026-119286 in the wild and no public exploit code.