CVE-2026-23538
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.89%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.89% probability · 57th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-770
- Source
- secalert@redhat.com
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
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23538.json
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.