CVE-2026-81315 | CVSS: N/A
Origin Validation Error vulnerability in ash-project ash_ai allows a malicious web page to bypass the MCP server's DNS-rebinding protection and issue cross-site requests to a user's local MCP server with that user's actor.
In AshAi.Mcp.Server, with the default allowed_origins: nil, origin_allowed?/3 accepts an origin when uri.host == conn.host and the forwarded scheme is https. Both values are attacker-controlled: conn.host comes from the Host header and the scheme is read from the raw x-forwarded-proto header with no trusted-proxy check. Under DNS rebinding the browser sends the attacker's o
参考链接:
• https://cna.erlef.org/cves/CVE-2026-81315.html
• https://github.com/ash-project/ash_ai/commit/28af68d73134df0b8fb3aa6ab03e8fd795b
• https://github.com/ash-project/ash_ai/security/advisories/GHSA-c92r-f3rr-q49h
📌 数据来源: NVD 官方