CVE-2026-62316

Published Aug 21, 2026

Last updated 3 days ago

CVSS high 8.8

Overview

Description
Microsoft UFO open-source framework for intelligent automation across devices and platforms. Prior to 3.0.8, ufo/client/mcp/http_servers/linux_mcp_server.py binds a FastMCP streamable HTTP server to localhost:8010 but does not validate the Host, Origin, or Sec-Fetch-Site headers. An attacker-controlled web page can use DNS rebinding to reach the local /mcp endpoint, enumerate tool schemas through tools/list, and invoke execute_command with a valid UFO_MCP_API_KEY to read files or execute allowed operating system commands as the victim's user. This issue is fixed in version 3.0.8.
Source
security-advisories@github.com
NVD status
Received

Risk scores

CVSS 3.1

Type
Secondary
Base score
8.8
Impact score
5.9
Exploitability score
2.8
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Severity
HIGH

Weaknesses

security-advisories@github.com
CWE-200

Social media

Hype score
Not currently trending

  1. CVE-2026-62316 (CVSS 8.8): Microsoft UFO linux_mcp_server.py FastMCP streamable HTTP on localhost:8010 — no Host/Origin/Sec-Fetch-Site bind. DNS-rebind a page to local /mcp → invoke execute_command as local user. Fixed in 3.0.8. Found by AAtomical. #CVE #MCP #AppSec #InfoSec

    @Innora_sg

    23 Aug 2026

    65 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

References

Sources include official advisories and independent security research.