Is CVE-2026-41486 actively exploited?

No active exploitation of CVE-2026-41486 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-41486 be exploited remotely?

Yes. CVE-2026-41486 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-41486?

CVE-2026-41486 has a CVSS score of 8.9 (HIGH).

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HIGH

CVE-2026-41486

CWE-94Published: May 8, 2026· Updated: May 13, 2026

8.9

CVSS v3.1

EPSS:0.08%probability of exploitation in 30 daysPercentile:24.1th

Official 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.

NVD Source

Technical Analysis

CVE-2026-41486 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (A) is needed, which slightly reduces the risk of mass automated attacks.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionA

ScopeX

Impact

Confidentiality

Integrity

Availability

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X