CVE-2025-66405: gateway SSRF — Fix

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.

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CVSS v3.1 Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Vendor	Product	Versions
portkey	gateway	< 1.14.0

References

Advisories & Patches

https://github.com/Portkey-AI/gateway/commit/b5a7825ba5f4e6918deb32d9969899ce2229a885 https://github.com/Portkey-AI/gateway/security/advisories/GHSA-hhh5-2cvx-vmfp

Other References

https://github.com/Portkey-AI/gateway/pull/1372

Frequently Asked Questions

What is CVE-2025-66405? +

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. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2025-66405? +

CVE-2025-66405 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2025-66405? +

CVE-2025-66405 affects products from portkey, specifically: gateway. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-66405? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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