CVE-2026-41486
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.
- Affected products
- Ray
- Anyscale Ray
- = 2.54.0
- Fix
- Available
- CVSS 4.0
- 8.9 HIGH
- CVSS 3.1
- 8.8 HIGH
- EPSS
- 0.5% (38th percentile)
- Weakness
- CWE-94, CWE-502
- NVD status
- Analyzed
- Published
- 2026-05-08
No indexed exploits for CVE-2026-41486 yet
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No exploit for CVE-2026-41486 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.