VULNERABILITY INTELLIGENCE
CVE-2026-56121
CVSS score9.8 CRITICAL
EPSS probability1.41%
CISA KEVNot currently listed
Published2026-06-24
Last modified2026-10-25
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description
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.
Weakness classification
- disclosure@vulncheck.com: CWE-502
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-502