{"id":"CVE-2026-77363","summary":"obsidian-tc Streamable HTTP transport permits cross-origin loopback vault access","details":"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.","aliases":["GHSA-pqh8-4pj7-32xx"],"modified":"2026-10-13T02:46:55.603107945Z","published":"2026-10-12T17:45:57.107Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77363.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-1385","CWE-346"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77363.json"},{"type":"FIX","url":"https://github.com/The-40-Thieves/obsidian-tc/commit/6428bfe6fdfd43aa7b4b369be3aecd6a268fb928"},{"type":"FIX","url":"https://github.com/The-40-Thieves/obsidian-tc/pull/74"},{"type":"WEB","url":"https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1"},{"type":"ADVISORY","url":"https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-pqh8-4pj7-32xx"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-77363"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/the-40-thieves/obsidian-tc","events":[{"introduced":"0"},{"fixed":"3956ed5173ebde7864c7d576c259e9e747b11d76"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.3.1"}],"source":"AFFECTED_FIELD"}}],"versions":["v1.2.1","v1.0.2","v1.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77363.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}