CVE-2026-41486HIGH 8.8EPSS p37.2%
CVE-2026-41486CVE-2026-41486
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.
Scoring
| CVSS 3.1 | 8.8 (HIGH) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| EPSS | 0.47% probability of exploitation · percentile 37.2% · 2026-06-19T12:03:05Z |
| Published | 2026-05-08 |
| Last modified | 2026-05-18 |
Underlying weaknesses· 2
References
2
| Type | Target | Confidence | Tier |
|---|---|---|---|
| Weakness | Deserialization of Untrusted Datacwe-502 | 0% | live |
| Weakness | Improper Control of Generation of Code ('Code Injection')cwe-94 | 0% | live |
Related by meaning· 6
Nearest entities by semantic similarity across the cs-graph corpus.