High severity8.8GHSA Advisory· Published May 8, 2026· Updated May 18, 2026
CVE-2026-41486
CVE-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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
rayPyPI | >= 2.49.0, < 2.55.0 | 2.55.0 |
Affected products
4- Range: >= 2.49.0, < 2.55.0
- osv-coords2 versions
< 25.9.0_git20260318-r1+ 1 more
- (no CPE)range: < 25.9.0_git20260318-r1
- (no CPE)range: >= 2.49.0, < 2.55.0
Patches
Vulnerability mechanics
References
7- github.com/ray-project/ray/commit/c02bd31ae31996805868baa446a131a8d304525fnvdPatchWEB
- github.com/ray-project/ray/pull/62056nvdIssue TrackingPatchWEB
- github.com/advisories/GHSA-mw35-8rx3-xf9rghsaADVISORY
- github.com/ray-project/ray/security/advisories/GHSA-mw35-8rx3-xf9rnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-41486ghsaADVISORY
- github.com/ray-project/ray/pull/54831ghsaWEB
- github.com/ray-project/ray/releases/tag/ray-2.55.0nvdProductRelease NotesWEB
News mentions
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