CVE-2026-81102

Dropbox Dash MCP Server DNS Rebinding via Missing Host Header Validation

State
Published
Severity
2.3 Low
Published
Aug 27, 2026
Updated
Aug 29, 2026
Reserved
Aug 26, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
4.02.3 LowCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:NVulnCheck
3.13.1 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:NVulnCheck

Weaknesses

Affected Products

ProductVersions
mcp-server-dashdropbox
  • 84567b74e3c72e42d5e50ee07c56864613f519c2Not affected
  • before 84567b74e3c72e42d5e50ee07c56864613f519c2Affected

References

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