CVE-2026-63731 hyperdxio CVE debrief

Who should care

Defenders responsible for HyperDX deployments, internal API security, and cloud provider metadata endpoint security should assess exposure and prioritize verification of their environments.

Why it matters

CVE-2026-63731 is a server-side request forgery vulnerability in HyperDX before version 2.31.0 that allows authenticated team members to direct the server to arbitrary internal destinations, potentially disclosing internal service response bodies and enabling access to internal APIs, container services, and cloud provider metadata endpoints. Defenders should prioritize verifying exposure to internal services, assessing the security of their HyperDX deployment, and upgrading to version 2.31.0 or later if necessary.

• Potential disclosure of internal service response bodies
• Possible access to internal APIs, container services, and cloud provider metadata endpoints
• Need for verification of HyperDX version and exposure to internal services
• Potential impact on security of internal services and data

Technical summary

The vulnerability is caused by a lack of URL validation or allowlist enforcement in the ClickHouse proxy test endpoint. This allows authenticated team members to supply a caller-controlled host parameter, potentially disclosing internal service response bodies. The vulnerability can be exploited by directing the server to arbitrary internal destinations, enabling access to internal APIs, container services, and cloud provider metadata endpoints. Attackers can exploit reflected error responses from the endpoint to disclose internal service response bodies.

Defensive priority

Defenders should prioritize verifying exposure to internal APIs, container services, and cloud provider metadata endpoints, and assess the security of their HyperDX deployment.

Recommended defensive actions

• Verify HyperDX version and upgrade to 2.31.0 or later if necessary
• Restrict access to the ClickHouse proxy test endpoint
• Monitor for suspicious activity and error responses from internal services
• Perform a thorough review of internal APIs, container services, and cloud provider metadata endpoints for potential exposure
• Implement additional logging and monitoring to detect potential exploitation attempts
• Conduct a thorough risk assessment to identify potential impacts on internal services and data
• Review and update incident response plans to address potential exploitation of this vulnerability

Evidence notes

The vulnerability allows attackers to exploit reflected error responses from the ClickHouse proxy test endpoint to disclose internal service response bodies. This could enable access to internal APIs, container services, and cloud provider metadata endpoints.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.