{"id":"CVE-2026-77363","revision":null,"records":[{"revision":"a22a2a0d1b8f4798a375cec3da7e319b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-77363","aliases":[],"title":"obsidian-tc Streamable HTTP transport permits cross-origin loopback vault access","description":"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.","state":0,"publishedAt":"2026-10-12T17:45:57.107+00:00","modifiedAt":"2026-10-13T16:03:13.858+00:00","affected":[{"ecosystem":"Vendor product","name":"obsidian-tc","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"The-40-Thieves\",\n                    \"product\": \"obsidian-tc\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.3.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-pqh8-4pj7-32xx","https://github.com/The-40-Thieves/obsidian-tc/pull/74","https://github.com/The-40-Thieves/obsidian-tc/commit/6428bfe6fdfd43aa7b4b369be3aecd6a268fb928","https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-77363","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-77363","identifiers":["CVE-2026-77363"]},"retained":false,"historicalAffected":[]},{"revision":"256ee312dec94d69bce99270aca870ec","observedAt":"2026-11-07T14:29:24.11+00:00","statement":{"source":"euvd","id":"EUVD-2026-97733","aliases":["CVE-2026-77363","GHSA-pqh8-4pj7-32xx"],"title":"obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults. 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Version 1.3.1 fixes the vulnerability by enabling host, origin, and DNS-rebinding validation.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":8.8,"severity":null}],"references":["https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-pqh8-4pj7-32xx","https://github.com/The-40-Thieves/obsidian-tc/pull/74","https://github.com/The-40-Thieves/obsidian-tc/commit/6428bfe6fdfd43aa7b4b369be3aecd6a268fb928","https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-97733","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 12, 2026, 5:45:57 PM","dateUpdated":"Oct 13, 2026, 4:03:13 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. 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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.","state":0,"publishedAt":"2026-10-12T18:17:23.513+00:00","modifiedAt":"2026-10-16T20:04:29.76+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://github.com/The-40-Thieves/obsidian-tc/commit/6428bfe6fdfd43aa7b4b369be3aecd6a268fb928","https://github.com/The-40-Thieves/obsidian-tc/pull/74","https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1","https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-pqh8-4pj7-32xx"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-77363","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-346","CWE-1385"],"productCriteria":[],"sourceDates":{"published":"2026-10-12T18:17:23.513","lastModified":"2026-10-16T20:04:29.760"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-77363","identifiers":["CVE-2026-77363"]},"retained":false,"historicalAffected":[]},{"revision":"b40fe4f119cc41cd81cf534c1a957e8a","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-pqh8-4pj7-32xx","aliases":["CVE-2026-77363"],"title":"obsidian-tc HTTP transport lacks Origin/DNS-rebinding protection, enabling drive-by vault access on loopback","description":"### Impact\nThe Streamable HTTP transport was constructed without `enableDnsRebindingProtection`/`allowedHosts`/`allowedOrigins` and performed no `Origin`-header validation. With the documented `auth.mode: \"none\"` loopback default, a **drive-by web page could `POST http://127.0.0.1/mcp`** and receive caller `http-local` with scopes `[\"*\"]` — full vault read/write — via DNS rebinding / a forged Origin.\n\n### Patches\nFixed in **1.3.1**. Upgrade to `>= 1.3.1`. The transport now enables DNS-rebinding protection and allowed hosts/origins and returns HTTP 403 on an invalid Origin (per MCP 2025-11-25).\n\n### Workarounds\nDo not expose the HTTP transport with `auth.mode: \"none\"`; require JWT auth, or bind to a non-loopback interface behind a proxy that validates `Origin`.","state":0,"publishedAt":"2026-10-23T18:29:02+00:00","modifiedAt":"2026-10-23T18:45:08.5772795+00:00","affected":[{"ecosystem":"npm","name":"obsidian-tc","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.3.1"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"CRITICAL"}],"references":["https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-pqh8-4pj7-32xx","https://github.com/The-40-Thieves/obsidian-tc/pull/74","https://github.com/The-40-Thieves/obsidian-tc/commit/6428bfe6fdfd43aa7b4b369be3aecd6a268fb928","https://github.com/The-40-Thieves/obsidian-tc","https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1","https://nvd.nist.gov/vuln/detail/cve-2026-77363"],"sourceUrl":"https://github.com/advisories/GHSA-pqh8-4pj7-32xx","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-pqh8-4pj7-32xx","identifiers":["GHSA-pqh8-4pj7-32xx","CVE-2026-77363"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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