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CVE-2026-56121

Feast < 0.63.0 Unauthenticated RCE via ApplyFeatureView gRPC Deserialization PUBLISHED

Description (CNA)

Feast before 0.63.0 contains an unsafe deserialization vulnerability that allows unauthenticated or unauthorized attackers to achieve remote code execution by sending a crafted gRPC request to the registry server. The user_defined_function.body field of an OnDemandFeatureView spec is decoded from base64 and passed to dill.loads() before any authorization check is performed, enabling attackers to embed a malicious serialized Python object with an arbitrary __reduce__ method to execute OS commands as the feast service account.

Affected (CNA)

Vendor / productVersions
feast-dev / feastaffected 0 before 0.63.0

CWE

CWE-502

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

redhat-SADP

A flaw was found in Feast. This vulnerability allows unauthenticated or unauthorized attackers to achieve remote code execution. By sending a specially crafted gRPC request to the registry server, attackers can exploit an unsafe deserialization process. This enables them to execute operating system commands as the Feast service account, leading to a complete compromise of the affected system.