GitHub Advisoryadvisory · PyPI
GHSA-gg2p-37pv-v7fq Feast vulnerable to arbitrary code execution via unsafe deserialization of dill-serialized UDFs
CRITICAL
Official page ↗
- Aliases
- CVE-2026-18948
- Ecosystem
- PyPI
- Packages
- feast
- Severity
- Critical
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weaknesses
- CWE-502
- Reviewed
- 2026-11-03
Affected packages
• PyPI feast: < 0.67.0 → fixed in 0.67.0
Description
A flaw was found in Feast. The system improperly deserializes user-defined functions (UDFs) stored in its registry, which are serialized using the 'dill' library. This allows a remote attacker to store a malicious UDF, leading to unauthenticated arbitrary code execution on the feature server in default configurations. An authenticated attacker can also achieve arbitrary code execution on the registry server by bypassing authorization checks during deserialization. This vulnerability can result in cross-tenant data access and lateral movement within the system.
Related
Alias · CVE (1)
- CVE-2026-18948 A flaw was found in Feast. vulnerability
Weakness · CWE (1)
- CWE-502 Deserialization of Untrusted Data weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-18948 advisory
- https://github.com/feast-dev/feast/issues/6827 web
- https://github.com/feast-dev/feast/pull/6861 web
- https://github.com/feast-dev/feast/commit/e0ef16ea1ed149ecd5dc9d4d0aa0fdbfa547f861 web
- https://access.redhat.com/errata/RHSA-2026:53261 web
- https://access.redhat.com/errata/RHSA-2026:53262 web
- https://access.redhat.com/errata/RHSA-2026:53263 web
- https://access.redhat.com/errata/RHSA-2026:60520 web
- https://access.redhat.com/security/cve/CVE-2026-18948 web
- https://bugzilla.redhat.com/show_bug.cgi?id=2511167 web
- https://github.com/feast-dev/feast package
- https://github.com/feast-dev/feast/releases/tag/v0.67.0 web