What’s Vulnerable › Vulnerabilities

CVE-2026-82270: Portkey AI Gateway Server-Side Request Forgery via /v1/proxy/*

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-28 · updated 2026-09-24
• Weakness: CWE-918

Description

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.

Affected products

• Portkey-AI gateway: from 1.14.0 through 1.15.2

References

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

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