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

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 maliciou...

CVE-2026-77363

The obsidian-tc Model Context Protocol server is vulnerable to cross-origin loopback vault access in versions prior to 1.3.1 . The Streamable HTTP transport fails to validate the Host or Origin headers and lacks DNS-rebinding protection . When configured with auth.mode set to none, a malicious we...