🛡️ CVE-2026-41486
🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-502 NVD
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CWE CWE-502
Public Exploit ✅ No
Source NVD
Published 2026-04-24
Updated 2026-06-15
Modified 2026-05-13
Fix URL N/A

Affected Packages

Software From version Fixed in
ray 2.49.0 2.55.0
unknown — —

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