CVE-2026-81102

Dropbox Dash MCP Server DNS Rebinding via Missing Host Header Validation

LOW
3.1
CVSS Score
Published: August 27, 2026 at 02:50 PM UTC
Updated: September 24, 2026 at 08:57 PM UTC
1 product affected across 1 vendorMcp Server Dash

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Severity
LOW3.1
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 84567b74e3c72e42d5e50ee07c56864613f519c2
Vendor states this is fixed in 84567b74e3c72e42d5e50ee07c56864613f519c2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

3.1LOWVulnCheck
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-346

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