{"schema":"threatline.record/2","record":{"id":"CVE-2026-77363","aliases":["GHSA-pqh8-4pj7-32xx"],"summary":"obsidian-tc HTTP transport lacks Origin/DNS-rebinding protection, enabling drive-by vault access on loopback","details":"### 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`.","categories":["Libraries & packages"],"product":"obsidian-tc","vendor":"The-40-Thieves","ecosystem":"npm","affected_ranges":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-pqh8-4pj7-32xx","source_modified_at":"2026-10-23T18:29:05Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"obsidian-tc"},"range":"< 1.3.1"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-77363","source_modified_at":"2026-10-13T16:03:13.858Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"obsidian-tc","vendor":"The-40-Thieves","versions":[{"status":"affected","version":"< 1.3.1"}],"defaultStatus":null},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-pqh8-4pj7-32xx","source_modified_at":"2026-10-23T18:45:08.577279509Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"obsidian-tc","ecosystem":"npm","purl":"pkg:npm/obsidian-tc"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.3.1"}]}],"versions":[]}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-pqh8-4pj7-32xx","source_modified_at":"2026-10-23T18:29:05Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"obsidian-tc"},"version":"1.3.1"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-pqh8-4pj7-32xx","source_modified_at":"2026-10-23T18:45:08.577279509Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"obsidian-tc","ecosystem":"npm","purl":"pkg:npm/obsidian-tc"},"version":"1.3.1"}],"cvss":9.6,"severity":"Critical","kev":{"listed":false},"epss":{"probability":0.00157,"percentile":0.0452,"score_date":"2026-10-23"},"published_at":"2026-10-12T17:45:57.107Z","modified_at":"2026-10-23T18:45:08.577279509Z","provenance":[{"source":"GitHub Advisory Database","url":"https://github.com/advisories/GHSA-pqh8-4pj7-32xx","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T18:29:05Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-77363","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-13T16:03:13.858Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-pqh8-4pj7-32xx","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-23T18:45:08.577279509Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-77363","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["GitHub Advisory Database","CVE List","OSV","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-pqh8-4pj7-32xx","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/The-40-Thieves/obsidian-tc/pull/74","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/The-40-Thieves/obsidian-tc/commit/6428bfe6fdfd43aa7b4b369be3aecd6a268fb928","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1","tags":["x_refsource_MISC"]},{"url":"https://nvd.nist.gov/vuln/detail/cve-2026-77363","source":"GitHub Advisory Database"},{"url":"https://github.com/advisories/GHSA-pqh8-4pj7-32xx","source":"GitHub Advisory Database"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"total","assessed_at":"2026-10-13T16:02:58.070125Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"ecosystem","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-23T18:45:08.577279509Z","content_hash":"faf672c2f7070d3694bf0861493cd5b2e4bcff02b0dfa27f970613a76188e7e9"}}