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Back to active CVEs
Low · CVSS 3.1CVE-2026-81102

Dropbox Dash MCP Server DNS Rebinding via Missing Host Header ValidationCVE-2026-81102

Answer in brief

CVE-2026-81102 records a Low severity (CVSS 3.1) vulnerability in Dropbox Dash MCP Server DNS Rebinding via Missing Host Header Validation. The current sources do not mark it as known exploited. The current feed maps dropbox/mcp-server-dash (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 27, 2026Updated Sep 24, 2026Source checked Oct 11, 2026First seen by HOL Aug 27, 2026Material review Sep 24, 2026
Upstream Advisory

Key facts

Risk
Low · CVSS 3.1
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 3.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps dropbox/mcp-server-dash (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
dropbox/mcp-server-dashgeneric>=0 <84567b74e3c72e42d5e50ee07c56864613f519c284567b74e3c72e42d5e50ee07c56864613f519c2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for dropbox/mcp-server-dash.
  2. 2Review the reported fix. Update dropbox/mcp-server-dash to 84567b74e3c72e42d5e50ee07c56864613f519c2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Aug 27, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 24, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 27, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

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Record context

Vulnerability class
Tool Poisoning
EPSS
Not reported
CWE IDs
CWE-346
Source
CVE List V5
Source checked
Oct 11, 2026
References
3 linked sources
Open source record