Medium 6.9Published Dec 1, 2025

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

Updated under an hour ago (Oct 27, 2026, 12:30 AM ET)

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It affects Portkey-AI gateway and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Portkey-AI gateway

Exploited in the last 30 days

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.

CVSS: 6.9 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Weakness (CWE): CWE-918
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Dec 2, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Portkey-AI gateway portkey_ai:gateway (from the name)	before 1.14.0	CNA record
portkey gateway portkey:gateway	before 1.14.0	NVD

References

References

https://github.com/Portkey-AI/gateway/security/advisories/GHSA-hhh5-2cvx-vmfp	x-refsource-confirm, vendor-advisory
https://github.com/Portkey-AI/gateway/pull/1372	x-refsource-misc, issue-tracking
https://github.com/Portkey-AI/gateway/commit/b5a7825ba5f4e6918deb32d9969899ce2229a885	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.