{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.3.1"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3956ed5173ebde7864c7d576c259e9e747b11d76"
            }
          ],
          "repo": "https://github.com/the-40-thieves/obsidian-tc",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-pqh8-4pj7-32xx"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-1385",
      "CWE-346"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77363.json"
  },
  "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.",
  "id": "CVE-2026-77363",
  "modified": "2026-10-13T02:30:38.474188359Z",
  "published": "2026-10-12T17:45:57.107Z",
  "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"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "obsidian-tc Streamable HTTP transport permits cross-origin loopback vault access"
}