NVD CRITICAL: CVE-2026-56121 — Feast before 0.63.0 contains an unsafe deserialization vulnerability that allows...

Wednesday, June 24, 2026 at 04:16 PM UTC·Source: NIST NVD

Updated: Wednesday, June 24, 2026 at 05:00 PM UTC

Executive Summary

Analysis

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. CVSS Score: 9.8. Published: 2026-06-24T16:16:33.193.

Indicators of Compromise (1)

CVE (1)

CVE-2026-56121

NVD MITRE CVE

Source Attribution

Originally published by NIST NVD on Jun 24, 2026. Verified by: NIST.

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