{"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"],"vendor":"The-40-Thieves","product":"obsidian-tc","affected":["obsidian-tc < 1.3.1"],"patched":["obsidian-tc 1.3.1"],"published":"2026-10-12","updated":"2026-10-16","sourceUpdated":"2026-10-16T20:04:29.760","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"},{"url":"https://nvd.nist.gov/vuln/detail/cve-2026-77363"},{"url":"https://github.com/advisories/GHSA-pqh8-4pj7-32xx"}],"tags":["nvd","cve.org","ghsa","npm"],"epss":0.00155,"epssPercentile":0.04601,"aliases":["GHSA-pqh8-4pj7-32xx"],"ecosystem":"npm","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-13T16:02:58.070125Z"},"scores":{"nvd":8.8,"ghsa":9.6},"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.\n\n## Package advisory (CVE-2026-77363)\n\nAffected packages:\n\n- `obsidian-tc < 1.3.1`\n\nPatched in:\n\n- `obsidian-tc 1.3.1`\n\nSource: https://github.com/advisories/GHSA-pqh8-4pj7-32xx","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}