CVE-2026-63731

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.

CVSS v4.0

6.3 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

7.7 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

EPSS

0.41% chance of exploitation in the next 30 days, 35th percentile

Published

2026-07-20

Updated

2026-07-28

Proof-of-concept exploits (1)

• hyperdxio/hyperdx/issues/2588

References

• CVE Record
• NVD entry

Related

• CVE-2026-63730
• CVE-2026-63764
• CVE-2026-63720
• CVE-2026-63765
• CVE-2026-63643
• CVE-2026-63766