obsidian-tc HTTP transport lacks Origin/DNS-rebinding protection, enabling drive-by vault access on loopback

{
  "id": "25496352ae8bf9dd8697d00359c2e0b9a39cec93bdc678beab2173fa4d231797",
  "url": "https://osv.dev/vulnerability/GHSA-pqh8-4pj7-32xx",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "obsidian-tc HTTP transport lacks Origin/DNS-rebinding protection, enabling drive-by vault access on loopback",
    "summary": "### Impact The 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. ### Patches Fixed 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). ### Workarounds Do 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`.",
    "evidence": "osv:GHSA-pqh8-4pj7-32xx",
    "products": [
      {
        "name": {
          "value": "obsidian-tc",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.3.1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "GHSA-pqh8-4pj7-32xx",
      "aliases": [
        "CVE-2026-77363",
        "GHSA-pqh8-4pj7-32xx"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.3.1"
                }
              ]
            }
          ],
          "package": {
            "name": "obsidian-tc",
            "purl": "pkg:npm/obsidian-tc",
            "ecosystem": "npm"
          },
          "database_specific": {
            "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-pqh8-4pj7-32xx/GHSA-pqh8-4pj7-32xx.json"
          }
        }
      ],
      "modified": "2026-10-23T18:45:08.577279509Z",
      "provider": "osv",
      "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"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-1385",
          "CWE-346"
        ],
        "severity": "CRITICAL",
        "github_reviewed": true,
        "nvd_published_at": "2026-10-12T18:17:23Z",
        "github_reviewed_at": "2026-10-23T18:29:02Z"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-77363",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/database_specific/severity"
  },
  "source_id": "core-osv",
  "document_id": 424600,
  "published_at": "2026-10-23T18:29:02+00:00"
}