obsidian-tc bridge tools expose data outside the read ACL

{
  "id": "0e37892171fbf80753ce7c8ce17e2f314762b82b90ac441d8478c52d88881ea0",
  "url": "https://osv.dev/vulnerability/CVE-2026-77362",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "obsidian-tc bridge tools expose data outside the read ACL",
    "summary": "obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults. Prior to 1.3.1, bridge tools do not consistently apply the read access-control list (ACL) to every returned field. The tasks_filter tool exposes group counts derived from denied notes, makemd_query passes unfiltered sibling result fields through, and list_templates exposes template paths and parsed user-function bodies without a read-whitelist check. An authenticated caller can consequently infer or read data from notes outside the caller's read ACL. Version 1.3.1 fixes the vulnerability by filtering path-attributable fields and applying the read whitelist to list_templates.",
    "evidence": "osv:CVE-2026-77362",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-77362",
      "aliases": [
        "CVE-2026-77362",
        "GHSA-43r2-c7g8-prc8"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/the-40-thieves/obsidian-tc",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3956ed5173ebde7864c7d576c259e9e747b11d76"
                },
                {
                  "fixed": "5ab2109274acf0070601fa71a62b14ddc9652309"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.3.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "5ab2109274acf0070601fa71a62b14ddc9652309"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "3956ed5173ebde7864c7d576c259e9e747b11d76"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v1.3.1"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.2.1",
            "v1.0.2",
            "v1.0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77362.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.805716748Z",
      "provider": "osv",
      "references": [
        "https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77362.json",
        "https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-43r2-c7g8-prc8",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-77362",
        "https://github.com/The-40-Thieves/obsidian-tc/commit/5ab2109274acf0070601fa71a62b14ddc9652309",
        "https://github.com/The-40-Thieves/obsidian-tc/pull/75"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-200",
          "CWE-863"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77362.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-77362",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491579,
  "published_at": "2026-10-13T14:00:11.565+00:00"
}