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Vulnerability record · CVE-2026-18941 · published 10 August 2026

CVE-2026-18941: Missing authentication for critical function vulnerability

A flaw was found in Feast and feast-operator. The default configuration for both the Feast SDK and the feast-operator is "no_auth," meaning no security manager is installed. This default allows unauthenticated and unauthorized access to feature-server, registry-server, and offline-server endpoints. A remote attacker, by exploiting this missing authentication, could achieve remote code execution (RCE) by storing a malicious User-Defined Function (UDF) on the feature-server, trigger a denial of service (DoS) by forcing re-materialization of all tenant features, and gain unauthorized access to cross-tenant data.

7.7 CVSS 3.1 High EPSS 0.83% · top 44.3% CWE-306 · Missing authentication for critical function Awaiting Analysis
7.7CVSS 3.1 base score
0.83%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
14 Aug 2026Last modified by NVD

Description

A flaw was found in Feast and feast-operator. The default configuration for both the Feast SDK and the feast-operator is "no_auth," meaning no security manager is installed. This default allows unauthenticated and unauthorized access to feature-server, registry-server, and offline-server endpoints. A remote attacker, by exploiting this missing authentication, could achieve remote code execution (RCE) by storing a malicious User-Defined Function (UDF) on the feature-server, trigger a denial of service (DoS) by forcing re-materialization of all tenant features, and gain unauthorized access to cross-tenant data.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

References

LinkTags
https://access.redhat.com/errata/RHSA-2026:53261
https://access.redhat.com/errata/RHSA-2026:53262
https://access.redhat.com/errata/RHSA-2026:53263
https://access.redhat.com/security/cve/CVE-2026-18941
https://bugzilla.redhat.com/show_bug.cgi?id=2511116

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Source: NIST National Vulnerability Database (record CVE-2026-18941), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.