CVE-2026-23538

7.5 highEPSS 0.9%

High (7.5). EPSS 0.9% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.5 high

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

EPSS: 0.9% chance of exploitation in the next 30 days; higher than 59% of CVEs (scores of 2026-10-31)
CWE: CWE-770
Published: 2026-07-16
Modified: 2026-07-16
Record from: the NVD, synced 2026-10-19

References

https://access.redhat.com/security/cve/CVE-2026-23538
https://bugzilla.redhat.com/show_bug.cgi?id=2429311
https://github.com/red-hat-data-services/feast/pull/192
https://access.redhat.com/security/cve/CVE-2026-23538
https://bugzilla.redhat.com/show_bug.cgi?id=2429311

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