{"id":"CVE-2026-77363","title":"obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults","summary":"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 l…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-346","CWE-1385"],"published":"2026-10-12","updated":"2026-10-12","sourceUpdated":"2026-10-12T18:17:23.513","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-77363","references":[{"url":"https://github.com/The-40-Thieves/obsidian-tc/commit/6428bfe6fdfd43aa7b4b369be3aecd6a268fb928","label":"security-advisories@github.com"},{"url":"https://github.com/The-40-Thieves/obsidian-tc/pull/74","label":"security-advisories@github.com"},{"url":"https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1","label":"security-advisories@github.com"},{"url":"https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-pqh8-4pj7-32xx","label":"security-advisories@github.com"}],"tags":["nvd"],"ingestedAt":"2026-10-12T19:01:57.229Z","slug":"CVE-2026-77363","body":"## Overview\n\nobsidian-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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}