CVE-2026-63731 HyperDX < 2.31.0 SSRF via ClickHouse Proxy Test Endpoint
Authenticated users can exploit an SSRF vulnerability in the ClickHouse proxy test endpoint to access internal services and cloud metadata.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-63731?
CVE-2026-63731 is a medium-severity server-side request forgery vulnerability in hyperdxio hyperdx, published on 20 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
HyperDX before 2.31.0 contains a server-side request forgery vulnerability that allows authenticated team members to direct the server to arbitrary internal destinations by supplying a caller-controlled host parameter to the ClickHouse proxy test endpoint with no URL validation or allowlist enforcement. Attackers can exploit the reflected error responses from the endpoint to disclose internal service response bodies, enabling access to internal APIs, container services, and cloud provider metadata endpoints.
Weakness: CWE-918
Which versions are affected by CVE-2026-63731?
How do I fix CVE-2026-63731?
No fix has been published for CVE-2026-63731 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-63731 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-63731 exists.
Sources
Also known as GHSA-687c-pppw-76h3.