Vulnerability · Published Oct 14, 2026 · Assigned by VulnCheck

CVE-2026-110719Portkey AI Gateway 1.14.0 through 1.15.2 SSRF via x-portkey-custom-host Header

High 7.2

In plain English

A high-severity server-side request forgery in gateway from Portkey-AI. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)0.4%top 69.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Portkey AI Gateway 1.14.0 through 1.15.2 contains a server-side request forgery vulnerability that allows unauthenticated attackers to reach loopback and Docker host services because isValidCustomHost trusts localhost-style hosts when TRUSTED_CUSTOM_HOSTS is unset. Attackers can send /v1 requests with a crafted x-portkey-custom-host header, such as via the ollama provider, to make the gateway call internal services and return their responses.

Affected products (as reported)

Vendor	Product	Versions
Portkey-AI	gateway	1.14.0 – through 1.15.2

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

References

https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/BJypv-aiMg technical-description, exploit
https://github.com/Portkey-AI/gateway/blob/ca7712947ec8c0887803990b746740d36011c697/src/middlewares/requestValidator/index.ts#L289 technical-description
https://github.com/Portkey-AI/gateway product
VulnCheck Advisory: Portkey AI Gateway 1.14.0 through 1.15.2 SSRF via x-portkey-custom-host Header third-party-advisory