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.
Published: 2026-08-10
Score: 7.7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Workaround

To mitigate this vulnerability, configure Feast deployments to utilize Kubernetes RBAC authentication. Ensure that `FeatureStore` Custom Resources (CRs) explicitly define an authentication mechanism other than `no_auth`. For Feast SDK usage, avoid the `no_auth` setting in production environments unless `FEAST_INSECURE_NO_AUTH=1` is explicitly set, acknowledging the security implications. Applying these configuration changes will require a redeployment or restart of the affected Feast services.

Tracking

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Advisories

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History

Tue, 11 Aug 2026 19:00:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:openshift_ai:2.25::el9
cpe:/a:redhat:openshift_ai:3.4::el9
References

Tue, 11 Aug 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 11 Aug 2026 15:45:00 +0000

Type Values Removed Values Added
First Time appeared Red Hat
Red Hat red Hat Openshift Ai (rhoai)
Vendors & Products Red Hat
Red Hat red Hat Openshift Ai (rhoai)

Tue, 11 Aug 2026 05:15:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:openshift_ai:3.3::el9
References

Tue, 11 Aug 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 threat_severity

Important

Mon, 10 Aug 2026 21:00:00 +0000

Type Values Removed Values Added
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.
Title Feast: feast-operator: feast: default authentication mode is no_auth — shared multi-tenant instances deployed without authentication
First Time appeared Redhat
Redhat openshift Ai
Weaknesses CWE-306
CPEs cpe:/a:redhat:openshift_ai
Vendors & Products Redhat
Redhat openshift Ai
References
Metrics cvssV3_1

{'score': 7.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N'}

Subscriptions

Red Hat Red Hat Openshift Ai (rhoai)
Redhat Openshift Ai
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-08-11T18:38:57.746Z

Reserved: 2026-08-05T13:24:03.497Z

Link: CVE-2026-18941

cve-icon Vulnrichment

Updated: 2026-08-11T17:41:14.384Z

cve-icon NVD

Status : Received

Published: 2026-08-10T21:17:20.777

Modified: 2026-08-11T19:17:29.720

Link: CVE-2026-18941

cve-icon Redhat

Severity : Important

Publid Date: 2026-08-10T18:51:18Z

Links: CVE-2026-18941 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-11T14:21:45Z

Weaknesses
  • CWE-306

    Missing Authentication for Critical Function