CVE-2026-23538
Feast: resource exhaustion via websocket endpoint
CVSS Score
7.5
EPSS Score
0.7%
EPSS Percentile
50th
A vulnerability was identified in the Feast Feature Server's `/ws/chat` endpoint that allows remote attackers to establish persistent WebSocket connections without any authentication. By opening a large number of simultaneous connections, an attacker can exhaust server resources—such as memory, CPU, and file descriptors—leading to a complete denial of service for legitimate users.
| CWE | CWE-770 |
| Vendor | feast |
| Product | feast feature server |
| Published | Jul 16, 2026 |
| Last Updated | Jul 16, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
Feast / Feast Feature Server
0 < 0.59.0
Red Hat / Red Hat OpenShift AI (RHOAI)
All versions affected Red Hat / Red Hat OpenShift AI (RHOAI)
All versions affected Red Hat / Red Hat OpenShift AI (RHOAI)
All versions affected Red Hat / Red Hat OpenShift AI (RHOAI)
All versions affected Red Hat / Red Hat OpenShift AI (RHOAI)
All versions affected Red Hat / Red Hat OpenShift AI (RHOAI)
All versions affected Red Hat / Red Hat OpenShift AI (RHOAI)
All versions affected Red Hat / Red Hat OpenShift AI (RHOAI)
All versions affected Red Hat / Red Hat OpenShift AI (RHOAI)
All versions affected Red Hat / Red Hat OpenShift AI (RHOAI)
All versions affected Red Hat / Red Hat OpenShift AI (RHOAI)
All versions affected Red Hat / Red Hat OpenShift AI (RHOAI)
All versions affected Red Hat / Red Hat OpenShift AI (RHOAI)
All versions affected Red Hat / Red Hat OpenShift AI (RHOAI)
All versions affected References
access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-23538 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2429311 github.com: https://github.com/red-hat-data-services/feast/pull/192 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23538.json
Credits
This issue was discovered by Jitendra Yejare (Red Hat).