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

{
  "id": "5378fc177bdd39d49f4d0924d45e14a995a4c31005c5455606d3c03e562b6f36",
  "url": "https://osv.dev/vulnerability/CVE-2026-82270",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Portkey AI Gateway Server-Side Request Forgery via /v1/proxy/*",
    "summary": "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.",
    "evidence": "osv:CVE-2026-82270",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-82270",
      "aliases": [
        "CVE-2026-82270"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/portkey-ai/gateway",
              "type": "GIT",
              "events": [
                {
                  "introduced": "da1a1d04fe3578bdeafbbcbe035f278030f02cfb"
                },
                {
                  "last_affected": "ca7712947ec8c0887803990b746740d36011c697"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.14.0"
                      },
                      {
                        "last_affected": "1.15.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.15.2"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.15.2",
            "v1.15.1",
            "v1.15.0",
            "v1.14.3",
            "v1.14.2",
            "v1.14.0",
            "v1.14.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-82270.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.896925530Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82270.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-82270",
        "https://www.vulncheck.com/advisories/portkey-ai-gateway-server-side-request-forgery-via-v1-proxy",
        "https://github.com/Portkey-AI/gateway/issues/1718",
        "https://github.com/Portkey-AI/gateway",
        "https://github.com/Portkey-AI/gateway/blob/669825cbe89ee51569918b8f78a9db486fd69dd4/src/index.ts"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-918"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82270.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-82270",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 493414,
  "published_at": "2026-08-28T16:18:53.484+00:00"
}