CVE-2026-82270

HIGH 7.5

Portkey AI Gateway Server-Side Request Forgery via /v1/proxy/*

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

Portkey AI Gateway through 1.15.2 contains a server-side request forgery vulnerability in the /v1/proxy/* route that lacks requestValidator middleware. Attackers can set the x-portkey-custom-host header to internal addresses and forward requests with Authorization headers to reach internal services and exfiltrate provider API keys.

CWE	CWE-918
Vendor	portkey-ai
Product	gateway
Published	Aug 28, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

Portkey-AI / gateway

1.14.0 ≤ 1.15.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/Portkey-AI/gateway/issues/1718 github.com: https://github.com/Portkey-AI/gateway github.com: https://github.com/Portkey-AI/gateway/blob/669825cbe89ee51569918b8f78a9db486fd69dd4/src/index.ts vulncheck.com: https://www.vulncheck.com/advisories/portkey-ai-gateway-server-side-request-forgery-via-v1-proxy

Credits

🔍 George Chen