{"id":"CVE-2026-81102","summary":"Dropbox Dash MCP Server DNS Rebinding via Missing Host Header Validation","details":"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.","modified":"2026-10-08T02:52:04.068218195Z","published":"2026-08-27T14:50:41.263Z","database_specific":{"cwe_ids":["CWE-346"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81102.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81102.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81102"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/dropbox-dash-mcp-server-dns-rebinding-via-missing-host-header-validation"},{"type":"FIX","url":"https://github.com/dropbox/mcp-server-dash/pull/12"},{"type":"PACKAGE","url":"https://github.com/dropbox/mcp-server-dash"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/dropbox/mcp-server-dash","events":[{"introduced":"0"},{"fixed":"84567b74e3c72e42d5e50ee07c56864613f519c2"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81102.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}