CVE-2026-81102 LOW

CVE-2026-81102: Dropbox Dash MCP Server DNS Rebinding via Missing Host Header Validation

Vendor Dropbox
Product mcp-server-dash
Weakness CWE-346 · Origin validation
Published August 27, 2026
Last update August 29, 2026

CVSS base score

2.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

The Dash MCP server bound its listener to the loopback address but never checked the host a request named. src/mcp_server_dash.py constructed the server for its network mode with the interface restricted to loopback and no transport-security settings, so a name that had been pointed at the loopback address still reached the listener while carrying the attacker's host name. A page in a visitor's browser could therefore drive the local server and invoke its company-search and file-detail tools under the Dropbox credential the server holds. Only the network mode was reachable this way; the standard input mode was not. The fix supplies transport-security settings that enable host checking and allow only the loopback name and port, rejecting other hosts before a tool runs. The repository publishes no versions, so the affected boundary is the commit preceding the fix.

Key dates

02Disclosure timeline

August 27, 2026 CVE published
August 29, 2026 Record updated