Deserialization of Untrusted Data Affecting feast package, versions [0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PYTHON-FEAST-18612609
- published11 Aug 2026
- disclosed10 Aug 2026
- creditUnknown
Introduced: 10 Aug 2026
NewCVE-2026-18948 (opens in a new tab)How to fix?
There is no fixed version for feast.
Overview
feast is a Python SDK for Feast
Affected versions of this package are vulnerable to Deserialization of Untrusted Data through the registry’s user-defined function handling in the registry server and feature server components. An attacker can execute arbitrary code by storing a malicious serialized UDF in the registry and causing it to be deserialized. In default deployments, this leads to unauthenticated code execution on the feature server, and an authenticated attacker can also execute code on the registry server by abusing the deserialization path, enabling cross-tenant data access and lateral movement.
Notes
- The issue was originally reported for RedHat's fork of Feast at
red-hat-data-services/feast
Details
Serialization is a process of converting an object into a sequence of bytes which can be persisted to a disk or database or can be sent through streams. The reverse process of creating object from sequence of bytes is called deserialization. Serialization is commonly used for communication (sharing objects between multiple hosts) and persistence (store the object state in a file or a database). It is an integral part of popular protocols like Remote Method Invocation (RMI), Java Management Extension (JMX), Java Messaging System (JMS), Action Message Format (AMF), Java Server Faces (JSF) ViewState, etc.
Deserialization of untrusted data (CWE-502) is when the application deserializes untrusted data without sufficiently verifying that the resulting data will be valid, thus allowing the attacker to control the state or the flow of the execution.