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CVE-2026-81315 MCP DNS-rebinding origin check in AshAi is bypassed by a spoofed X-Forwarded-Proto header

🗓️ 31 Aug 2026 00:57:55Reported by EEFType 
cvelist
 cvelist
🔗 www.cve.org👁 76 Views

DNS-rebinding origin bypass in ash_ai via spoofed X-Forwarded-Proto header.

Related
Affected
Refs
[
  {
    "collectionURL": "https://repo.hex.pm",
    "cpes": [
      "cpe:2.3:a:ash-project:ash_ai:*:*:*:*:*:*:*:*"
    ],
    "defaultStatus": "unaffected",
    "modules": [
      "'Elixir.AshAi.Mcp.Server'"
    ],
    "packageName": "ash_ai",
    "packageURL": "pkg:hex/ash_ai",
    "product": "ash_ai",
    "programFiles": [
      "lib/ash_ai/mcp/server.ex"
    ],
    "programRoutines": [
      {
        "name": "'Elixir.AshAi.Mcp.Server':check_origin/2"
      },
      {
        "name": "'Elixir.AshAi.Mcp.Server':origin_allowed?/3"
      }
    ],
    "repo": "https://github.com/ash-project/ash_ai",
    "vendor": "ash-project",
    "versions": [
      {
        "lessThan": "1.0.0",
        "status": "affected",
        "version": "0.8.0",
        "versionType": "semver"
      }
    ]
  },
  {
    "collectionURL": "https://github.com",
    "cpes": [
      "cpe:2.3:a:ash-project:ash_ai:*:*:*:*:*:*:*:*"
    ],
    "defaultStatus": "unaffected",
    "modules": [
      "'Elixir.AshAi.Mcp.Server'"
    ],
    "packageName": "ash-project/ash_ai",
    "packageURL": "pkg:github/ash-project/ash_ai",
    "product": "ash_ai",
    "programFiles": [
      "lib/ash_ai/mcp/server.ex"
    ],
    "programRoutines": [
      {
        "name": "'Elixir.AshAi.Mcp.Server':check_origin/2"
      },
      {
        "name": "'Elixir.AshAi.Mcp.Server':origin_allowed?/3"
      }
    ],
    "repo": "https://github.com/ash-project/ash_ai",
    "vendor": "ash-project",
    "versions": [
      {
        "lessThan": "28af68d73134df0b8fb3aa6ab03e8fd795b07c21",
        "status": "affected",
        "version": "c94f0b17fbe252f68755ba512678586164ba6139",
        "versionType": "git"
      }
    ]
  }
]

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