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CVE-2026-77363

CVE-2026-77363 · obsidian-tc Streamable HTTP transport permits cross-origin loopback vault access

This page contains facts from public vulnerability sources. Check the original advisory before updating.

obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults. Prior to 1.3.1, the Streamable HTTP transport does not validate the Host or Origin header or enable DNS-rebinding protection. When the documented loopback configuration uses auth.mode set to none, a malicious web page can send requests to the local MCP endpoint and receive unrestricted vault access through the http-local caller. Version 1.3.1 fixes the vulnerability by enabling host, origin, and DNS-rebinding validation.

CVSS 8.8 · High · EPSS 0.2% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • obsidian-tc

    Versions
    • < 1.3.1: Affected

    No fix published

  • obsidian-tc npm

    Affected ranges
    • SEMVER: < 1.3.1

    Update to 1.3.1

Original sources

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