Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Anyscale | Ray | 2.54.0 |
Related Weaknesses (CWE)
References
- https://github.com/ray-project/ray/commit/c02bd31ae31996805868baa446a131a8d30452Patch
- https://github.com/ray-project/ray/pull/62056Issue TrackingPatch
- https://github.com/ray-project/ray/releases/tag/ray-2.55.0ProductRelease Notes
- https://github.com/ray-project/ray/security/advisories/GHSA-mw35-8rx3-xf9rVendor Advisory
FAQ
What is CVE-2026-41486?
CVE-2026-41486 is a vulnerability with a CVSS score of 8.8 (HIGH). 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_sha...
How severe is CVE-2026-41486?
CVE-2026-41486 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-41486?
Check the references section above for vendor advisories and patch information. Affected products include: Anyscale Ray.