{"id":"GHSA-pqh8-4pj7-32xx","revision":"b40fe4f119cc41cd81cf534c1a957e8a","records":[{"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":[]}