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    2 vulnerabilities by jimprosser

    CVE-2026-54618 (GCVE-0-2026-54618)

    Vulnerability from nvd – Published: 2026-09-17 19:45 – Updated: 2026-09-17 19:45
    VLAI
    Title
    Obsidian Web MCP: Unauthenticated vault access: /oauth/authorize auto-approves without authenticating the user
    Summary
    Obsidian Web MCP is a secure remote MCP server for Obsidian vaults. Prior to 0.2.0, /oauth/authorize issues an authorization code without a login, consent, or session check, and /oauth/token can exchange that code for the static VAULT_MCP_TOKEN without authenticating a client. An unauthenticated remote caller who can reach the intended tunnel deployment can therefore call /mcp and use vault_read, vault_write, vault_search, vault_list, vault_move, and vault_delete against the entire vault. Optional PKCE does not prevent an attacker-initiated flow, and unauthenticated /oauth/register also exposes a client_credentials path by returning the configured VAULT_OAUTH_CLIENT_SECRET. This issue is fixed in version 0.2.0.
    Severity
    9.4 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
    CWE
    • CWE-306 - Missing Authentication for Critical Function
    • CWE-522 - Insufficiently Protected Credentials
    • CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
    Assigner
    References
    Impacted products
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "obsidian-web-mcp",
          "vendor": "jimprosser",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.2.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Obsidian Web MCP is a secure remote MCP server for Obsidian vaults. Prior to 0.2.0, /oauth/authorize issues an authorization code without a login, consent, or session check, and /oauth/token can exchange that code for the static VAULT_MCP_TOKEN without authenticating a client. An unauthenticated remote caller who can reach the intended tunnel deployment can therefore call /mcp and use vault_read, vault_write, vault_search, vault_list, vault_move, and vault_delete against the entire vault. Optional PKCE does not prevent an attacker-initiated flow, and unauthenticated /oauth/register also exposes a client_credentials path by returning the configured VAULT_OAUTH_CLIENT_SECRET. This issue is fixed in version 0.2.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 9.4,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-306",
              "description": "CWE-306: Missing Authentication for Critical Function",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-522",
              "description": "CWE-522: Insufficiently Protected Credentials",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-601",
              "description": "CWE-601: URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T19:45:15.384Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/jimprosser/obsidian-web-mcp/security/advisories/GHSA-hwhg-mrjc-8g43",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/jimprosser/obsidian-web-mcp/security/advisories/GHSA-hwhg-mrjc-8g43"
        },
        {
          "name": "https://github.com/jimprosser/obsidian-web-mcp/pull/30",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/jimprosser/obsidian-web-mcp/pull/30"
        },
        {
          "name": "https://github.com/jimprosser/obsidian-web-mcp/commit/e4924f096ee7494a7999d6c0cceca9be08e48eef",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/jimprosser/obsidian-web-mcp/commit/e4924f096ee7494a7999d6c0cceca9be08e48eef"
        },
        {
          "name": "https://github.com/jimprosser/obsidian-web-mcp/releases/tag/v0.2.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/jimprosser/obsidian-web-mcp/releases/tag/v0.2.0"
        }
      ],
      "source": {
        "advisory": "GHSA-hwhg-mrjc-8g43",
        "discovery": "UNKNOWN"
      },
      "title": "Obsidian Web MCP: Unauthenticated vault access: /oauth/authorize auto-approves without authenticating the user"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-54618",
    "datePublished": "2026-09-17T19:45:15.384Z",
    "dateReserved": "2026-06-15T20:07:02.184Z",
    "dateUpdated": "2026-09-17T19:45:15.384Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

    CVE-2026-54618 (GCVE-0-2026-54618)

    Vulnerability from cvelistv5 – Published: 2026-09-17 19:45 – Updated: 2026-09-17 19:45
    VLAI
    Title
    Obsidian Web MCP: Unauthenticated vault access: /oauth/authorize auto-approves without authenticating the user
    Summary
    Obsidian Web MCP is a secure remote MCP server for Obsidian vaults. Prior to 0.2.0, /oauth/authorize issues an authorization code without a login, consent, or session check, and /oauth/token can exchange that code for the static VAULT_MCP_TOKEN without authenticating a client. An unauthenticated remote caller who can reach the intended tunnel deployment can therefore call /mcp and use vault_read, vault_write, vault_search, vault_list, vault_move, and vault_delete against the entire vault. Optional PKCE does not prevent an attacker-initiated flow, and unauthenticated /oauth/register also exposes a client_credentials path by returning the configured VAULT_OAUTH_CLIENT_SECRET. This issue is fixed in version 0.2.0.
    Severity
    9.4 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
    CWE
    • CWE-306 - Missing Authentication for Critical Function
    • CWE-522 - Insufficiently Protected Credentials
    • CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
    Assigner
    References
    Impacted products
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "obsidian-web-mcp",
          "vendor": "jimprosser",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.2.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Obsidian Web MCP is a secure remote MCP server for Obsidian vaults. Prior to 0.2.0, /oauth/authorize issues an authorization code without a login, consent, or session check, and /oauth/token can exchange that code for the static VAULT_MCP_TOKEN without authenticating a client. An unauthenticated remote caller who can reach the intended tunnel deployment can therefore call /mcp and use vault_read, vault_write, vault_search, vault_list, vault_move, and vault_delete against the entire vault. Optional PKCE does not prevent an attacker-initiated flow, and unauthenticated /oauth/register also exposes a client_credentials path by returning the configured VAULT_OAUTH_CLIENT_SECRET. This issue is fixed in version 0.2.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 9.4,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-306",
              "description": "CWE-306: Missing Authentication for Critical Function",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-522",
              "description": "CWE-522: Insufficiently Protected Credentials",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-601",
              "description": "CWE-601: URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T19:45:15.384Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/jimprosser/obsidian-web-mcp/security/advisories/GHSA-hwhg-mrjc-8g43",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/jimprosser/obsidian-web-mcp/security/advisories/GHSA-hwhg-mrjc-8g43"
        },
        {
          "name": "https://github.com/jimprosser/obsidian-web-mcp/pull/30",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/jimprosser/obsidian-web-mcp/pull/30"
        },
        {
          "name": "https://github.com/jimprosser/obsidian-web-mcp/commit/e4924f096ee7494a7999d6c0cceca9be08e48eef",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/jimprosser/obsidian-web-mcp/commit/e4924f096ee7494a7999d6c0cceca9be08e48eef"
        },
        {
          "name": "https://github.com/jimprosser/obsidian-web-mcp/releases/tag/v0.2.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/jimprosser/obsidian-web-mcp/releases/tag/v0.2.0"
        }
      ],
      "source": {
        "advisory": "GHSA-hwhg-mrjc-8g43",
        "discovery": "UNKNOWN"
      },
      "title": "Obsidian Web MCP: Unauthenticated vault access: /oauth/authorize auto-approves without authenticating the user"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-54618",
    "datePublished": "2026-09-17T19:45:15.384Z",
    "dateReserved": "2026-06-15T20:07:02.184Z",
    "dateUpdated": "2026-09-17T19:45:15.384Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}