{"cve":"CVE-2026-41486","nvd":{"published":"2026-05-08T22:16:29.903","modified":"2026-06-17T10:46:46.953","status":"Analyzed","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_v4":{"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","score":8.9},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-94","CWE-502"],"references":["https://github.com/ray-project/ray/commit/c02bd31ae31996805868baa446a131a8d304525f","https://github.com/ray-project/ray/pull/62056","https://github.com/ray-project/ray/releases/tag/ray-2.55.0","https://github.com/ray-project/ray/security/advisories/GHSA-mw35-8rx3-xf9r"],"products":["anyscale:ray"],"source":"nvd","synced_at":"2026-10-19T22:33:55.586217763+00:00"},"epss":{"cve":"CVE-2026-41486","score":0.00473,"percentile":0.40907,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-mw35-8rx3-xf9r","url":"https://osv.dev/vulnerability/GHSA-mw35-8rx3-xf9r","summary":"Ray: Remote Code Execution via Parquet Arrow Extension Type Deserialization","modified":"2026-09-10T03:51:02.380215690Z","packages":[{"ecosystem":"PyPI","name":"ray","purl":"pkg:pypi/ray","ranges":[">=2.49.0 <2.55.0"],"fixed":["2.55.0"]}]},{"id":"PYSEC-2026-2272","url":"https://osv.dev/vulnerability/PYSEC-2026-2272","summary":"","modified":"2026-07-13T07:26:16.094513511Z","packages":[{"ecosystem":"PyPI","name":"ray","purl":"pkg:pypi/ray","ranges":["<=2.54.0"],"fixed":[]}]},{"id":"PYSEC-2026-2296","url":"https://osv.dev/vulnerability/PYSEC-2026-2296","summary":"","modified":"2026-07-13T07:26:16.094513511Z","packages":[{"ecosystem":"PyPI","name":"ve-ray","purl":"pkg:pypi/ve-ray","ranges":["<=2.54.0"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}