{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-54618",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-15T20:07:02.184Z",
        "datePublished": "2026-09-17T19:45:15.384Z",
        "dateUpdated": "2026-09-24T20:40:37.956Z"
    },
    "containers": {
        "cna": {
            "title": "Obsidian Web MCP: Unauthenticated vault access: /oauth/authorize auto-approves without authenticating the user",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-306",
                            "lang": "en",
                            "description": "CWE-306: Missing Authentication for Critical Function",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-522",
                            "lang": "en",
                            "description": "CWE-522: Insufficiently Protected Credentials",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-601",
                            "lang": "en",
                            "description": "CWE-601: URL Redirection to Untrusted Site ('Open Redirect')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "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"
                    }
                }
            ],
            "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"
                }
            ],
            "affected": [
                {
                    "vendor": "jimprosser",
                    "product": "obsidian-web-mcp",
                    "versions": [
                        {
                            "version": "< 0.2.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-17T19:45:15.384Z"
            },
            "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."
                }
            ],
            "source": {
                "advisory": "GHSA-hwhg-mrjc-8g43",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/jimprosser/obsidian-web-mcp/security/advisories/GHSA-hwhg-mrjc-8g43",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-24T20:40:24.993933Z",
                                "id": "CVE-2026-54618",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-24T20:40:37.956Z"
                }
            }
        ]
    }
}