CVE-2026-41486
HIGH WAF: Medium
CVSS 8.8
Published: 2026-05-08
CWE-94 CWE-502
Ray is an AI compute engine. From version 2.54.0 to before version 2.55.0, Ray Data registers custom Arrow extension types (ray.data.arrow_tensor, ray.data.arrow_tensor_v2, ray.data.arrow_variable_shaped_tensor) globally in PyArrow. When PyArrow reads a Parquet file containing one of these extension types, it calls __arrow_ext_deserialize__ on the field's metadata bytes. Ray's implementation passes these bytes directly to cloudpickle.loads(), achieving arbitrary code execution during schema parsing, before any row data is read. This issue has been patched in version 2.55.0.
WAF Coverage Analysis
Code Injection
Medium WAF Coverage
OWASP: A03:2021 Injection
932xxx - Remote Code Execution 933xxx - PHP Injection 934xxx - Node.js / Generic Injection
Insecure Deserialization
Medium WAF Coverage
OWASP: A08:2021 Software and Data Integrity Failures
944xxx - Java Attack
Affected Software
| Vendor | Product | Version |
|---|---|---|
| anyscale | ray | 2.54.0 |
References
- github.com (Patch)
- github.com (Issue Tracking, Patch)
- github.com (Product, Release Notes)
- github.com (Vendor Advisory)