CVE-2026-62316: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in microsoft UFO
Description
Microsoft UFO versions prior to 3.0.8 contain a vulnerability where the FastMCP HTTP server bound to localhost:8010 does not validate Host, Origin, or Sec-Fetch-Site headers. This allows an attacker to use DNS rebinding to access the local /mcp endpoint, enumerate tool schemas, and invoke execute_command with a valid API key, potentially reading files or executing OS commands as the victim user. The issue is fixed in version 3.0.8.
CVSS v3.1
Score 8.8high
Affected software
microsoft
UFO
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-62316 affects Microsoft UFO, an open-source framework for intelligent automation. The vulnerability arises because the FastMCP streamable HTTP server in ufo/client/mcp/http_servers/linux_mcp_server.py binds to localhost:8010 but fails to validate critical HTTP headers (Host, Origin, Sec-Fetch-Site). This flaw enables DNS rebinding attacks, allowing a malicious web page to reach the local /mcp endpoint. An attacker can enumerate tool schemas via tools/list and invoke execute_command using a valid UFO_MCP_API_KEY, leading to unauthorized reading of files or execution of permitted OS commands under the victim's user context. The vulnerability is resolved in UFO version 3.0.8.
Potential Impact
An attacker can exploit this vulnerability remotely via DNS rebinding to bypass same-origin protections and interact with the local FastMCP server. This can lead to unauthorized disclosure of sensitive information and execution of operating system commands with the privileges of the victim user, resulting in high confidentiality, integrity, and availability impacts.
Mitigation Recommendations
Upgrade Microsoft UFO to version 3.0.8 or later, where this vulnerability is fixed. No other mitigations are specified. Patch status is confirmed by the vendor advisory indicating the fix in 3.0.8.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-13T19:27:58.314Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a88b714acd9273b49b4168f
Added to database: 08/21/2026, 20:37:40 UTC
Last enriched: 09/10/2026, 17:06:36 UTC
Last updated: 10/05/2026, 06:48:17 UTC
Views: 76
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