Vulnerability · Published Aug 21, 2026 · Assigned by GitHub_M

CVE-2026-62316Microsoft UFO: DNS Rebinding → Unauthenticated File Read / Command Execution

High 8.8

In plain English

A high-severity information exposure in UFO from microsoft. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.5%top 56.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
microsoft	UFO	< 3.0.8

Weakness: CWE-200, CWE-346 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

https://github.com/microsoft/UFO/security/advisories/GHSA-vf4c-mf32-gf2h x_refsource_CONFIRM
https://github.com/microsoft/UFO/commit/3851c5d4e17c2865c56a94a6530692bf6e7a9b02 x_refsource_MISC
https://github.com/microsoft/UFO/releases/tag/v3.0.8 x_refsource_MISC