CVE-2026-23538 Feast: resource exhaustion via websocket endpoint
Remote attackers can cause denial of service by exhausting server resources through unauthenticated WebSocket connections in Feast Feature Server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-23538?
CVE-2026-23538 is a high-severity denial of service vulnerability in Feast Feature Server, published on 16 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-770
Which versions are affected by CVE-2026-23538?
How do I fix CVE-2026-23538?
No fix has been published for CVE-2026-23538 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-23538 being exploited?
There is no known exploitation of CVE-2026-23538 in the wild and no public exploit code.
Sources
Also known as GHSA-gmv6-fcfc-3372.