MCPVault: PathFilter restricted directories (.git/.obsidian/node_modules) only denied at vault root, not nested

{
  "id": "616fa793439fa1322cba1d8e4154fd99b68ed0698ebf317d6613187afbff61bc",
  "url": "https://osv.dev/vulnerability/CVE-2026-57442",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "MCPVault: PathFilter restricted directories (.git/.obsidian/node_modules) only denied at vault root, not nested",
    "summary": "MCPVault is a lightweight Model Context Protocol server for safe access to files in an Obsidian vault. Prior to 0.11.5, PathFilter in src/pathfilter.ts uses root-anchored deny-list patterns, so nested .git, .obsidian, and node_modules path segments do not match the restriction and pass both isAllowed() and isAllowedForListing(). An attacker who influences a path selected by an AI agent can traverse nested repository or Obsidian metadata, read remote URLs or embedded tokens, or cause nested node_modules content to pollute the listAllTags index. This issue is fixed in version 0.11.5.",
    "evidence": "osv:CVE-2026-57442",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-57442",
      "aliases": [
        "CVE-2026-57442",
        "GHSA-9c83-rr99-vfwj"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/bitbonsai/mcpvault",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "0adb43901e1a08e85e14b42a8df2442fabc0b64a"
                },
                {
                  "fixed": "8795716b90d1c4090a82a58647e030763513f17e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "0adb43901e1a08e85e14b42a8df2442fabc0b64a"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "8795716b90d1c4090a82a58647e030763513f17e"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-57442.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.686478693Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57442.json",
        "https://github.com/bitbonsai/mcpvault/security/advisories/GHSA-9c83-rr99-vfwj",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-57442",
        "https://github.com/bitbonsai/mcpvault/issues/128",
        "https://github.com/bitbonsai/mcpvault/commit/0adb43901e1a08e85e14b42a8df2442fabc0b64a",
        "https://github.com/bitbonsai/mcpvault/commit/8795716b90d1c4090a82a58647e030763513f17e"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-22",
          "CWE-538"
        ],
        "cna_assigner": "GitHub_M",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "0.11.5"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              }
            ]
          },
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "0.11.5"
                  },
                  {
                    "fixed": "0.11.5"
                  }
                ],
                "source": "DESCRIPTION"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57442.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-57442",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496704,
  "published_at": "2026-09-15T17:50:48.077+00:00"
}