CVE-2025-66405 – Portkey.ai Gateway: Server-Side Request Forgery (SSRF) in Custom Host

CVE ID : CVE-2025-66405

Published : Dec. 1, 2025, 11:15 p.m. | 1 hour, 9 minutes ago

Description : Portkey.ai Gateway is a blazing fast AI Gateway with integrated guardrails. Prior to 1.14.0, the gateway determined the destination baseURL by prioritizing the value in the x-portkey-custom-host request header. The proxy route then appends the client-specified path to perform an external fetch. This can be maliciously used by users for SSRF attacks. This vulnerability is fixed in 1.14.0.

Severity: 6.9 | MEDIUM

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