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CVE-2025-66405

30
FAUCET Score

CVE-2025-66405 describes a Server-Side Request Forgery (SSRF) vulnerability in Portkey.ai Gateway versions prior to 1.14.0. This flaw allows attackers to manipulate the x-portkey-custom-host header to redirect the gateway's internal requests to arbitrary external URLs. With a CVSS score of 9.8 (Critical), this vulnerability is easily exploitable over the network without authentication, enabling full compromise of confidentiality, integrity, and availability. While no active exploitation, public exploit code, or significant community discussion has been observed, the high FAUCET Risk Score of 94/100 indicates its severe potential.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.14.0CPE matchmatch criteria
cpe:2.3:a:portkey:gateway:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

6.9MEDIUM

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/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

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
NONE
VS Integrity
NONE
VS Availability
NONE
SS Confidentiality
LOW
SS Integrity
LOW
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.33%
Probability of exploitation in next 30 days
EPSS Percentile
25.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0033 is in the 4th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: @portkey-ai/gatewayFixed in: 1.14.0

Vendor Advisories (1)

npmGHSA-hhh5-2cvx-vmfpmedium

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

Dec 2, 2025

References

github.com / Portkey-AI/gateway/commit/b5a7825ba5f4e6918deb32d9969899ce2229a885
Patch
github.com / Portkey-AI/gateway/pull/1372
Issue Tracking
github.com / Portkey-AI/gateway/security/advisories/GHSA-hhh5-2cvx-vmfp
Vendor Advisory