id: PYSEC-2026-2272
published: "2026-05-08T22:16:29.903Z"
modified: "2026-07-13T05:51:14.917971Z"
aliases:
- CVE-2026-41486
- GHSA-mw35-8rx3-xf9r
details: 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:
- package:
    name: ray
    ecosystem: PyPI
    purl: pkg:pypi/ray
  ranges:
  - type: ECOSYSTEM
    events:
    - introduced: "0"
    - last_affected: 2.54.0
  versions:
  - 0.1.1
  - 0.1.2
  - 0.2.0
  - 0.2.1
  - 0.2.2
  - 0.3.0
  - 0.3.1
  - 0.4.0
  - 0.5.0
  - 0.5.2
  - 0.5.3
  - 0.6.0
  - 0.6.1
  - 0.6.2
  - 0.6.3
  - 0.6.4
  - 0.6.5
  - 0.6.6
  - 0.7.0
  - 0.7.1
  - 0.7.2
  - 0.7.3
  - 0.7.4
  - 0.7.5
  - 0.7.6
  - 0.7.7
  - 0.8.0
  - 0.8.1
  - 0.8.2
  - 0.8.3
  - 0.8.4
  - 0.8.5
  - 0.8.6
  - 0.8.7
  - 1.0.0
  - 1.0.1
  - 1.1.0
  - 1.10.0
  - 1.11.0
  - 1.11.1
  - 1.12.0
  - 1.12.1
  - 1.13.0
  - 1.2.0
  - 1.3.0
  - 1.4.0
  - 1.4.1
  - 1.5.0
  - 1.5.1
  - 1.5.2
  - 1.6.0
  - 1.7.0
  - 1.7.1
  - 1.8.0
  - 1.9.0
  - 1.9.1
  - 1.9.2
  - 2.0.0
  - 2.0.1
  - 2.1.0
  - 2.10.0
  - 2.11.0
  - 2.12.0
  - 2.2.0
  - 2.20.0
  - 2.21.0
  - 2.22.0
  - 2.23.0
  - 2.24.0
  - 2.3.0
  - 2.3.0rc0
  - 2.3.1
  - 2.30.0
  - 2.31.0
  - 2.32.0
  - 2.32.0rc0
  - 2.33.0
  - 2.34.0
  - 2.35.0
  - 2.36.0
  - 2.36.1
  - 2.37.0
  - 2.38.0
  - 2.39.0
  - 2.4.0
  - 2.40.0
  - 2.41.0
  - 2.42.0
  - 2.42.1
  - 2.43.0
  - 2.44.0
  - 2.44.1
  - 2.45.0
  - 2.46.0
  - 2.47.0
  - 2.47.1
  - 2.48.0
  - 2.49.0
  - 2.49.1
  - 2.49.2
  - 2.5.0
  - 2.5.1
  - 2.50.0
  - 2.50.1
  - 2.51.0
  - 2.51.1
  - 2.51.2
  - 2.52.0
  - 2.52.1
  - 2.53.0
  - 2.54.0
  - 2.6.0
  - 2.6.1
  - 2.6.2
  - 2.6.3
  - 2.7.0
  - 2.7.0rc0
  - 2.7.1
  - 2.7.2
  - 2.8.0
  - 2.8.1
  - 2.9.0
  - 2.9.1
  - 2.9.2
  - 2.9.3
  ecosystem_specific: {}
references:
- type: ADVISORY
  url: https://github.com/ray-project/ray/releases/tag/ray-2.55.0
- type: ADVISORY
  url: https://github.com/ray-project/ray/security/advisories/GHSA-mw35-8rx3-xf9r
- type: FIX
  url: https://github.com/ray-project/ray/commit/c02bd31ae31996805868baa446a131a8d304525f
- type: FIX
  url: https://github.com/ray-project/ray/pull/62056
severity:
- type: CVSS_V3
  score: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H