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CVE-2025-66405

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

Published: Dec 1, 2025Updated: Feb 20, 2026 Sources: CVE List NVD GHSACWE-918
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
0.3%
Top 77.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-918

Affected Products

gatewayportkey
SaaS
Cloud & SaaS / api-gateway
gatewayPortkey-AI
SaaS
Cloud & SaaS / api-gateway
@portkey-ai/gatewaynpmOSS Libraries
portkeycommercialCloud & SaaS
portkey-aicommercialCloud & SaaS
npmpackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Command and Control
Initial Access
View detailed technique mapping

References

https://github.com/Portkey-AI/gateway/commit/b5a7825ba5f4e6918deb32d9969899ce2229a885
github.com
https://github.com/Portkey-AI/gateway/pull/1372
github.com
https://github.com/Portkey-AI/gateway/security/advisories/GHSA-hhh5-2cvx-vmfp
github.com
and 2 more references View all →

Timeline

Published
Dec 1, 2025
Last Updated
Feb 20, 2026

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