{"id":"CVE-2026-54618","revision":null,"records":[{"revision":"1d5290378e75463ca5b4f46083538897","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-54618","aliases":[],"title":"Obsidian Web MCP: Unauthenticated vault access: /oauth/authorize auto-approves without authenticating the user","description":"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.","state":0,"publishedAt":"2026-09-17T19:45:15.384+00:00","modifiedAt":"2026-09-24T20:40:37.956+00:00","affected":[{"ecosystem":"Vendor product","name":"obsidian-web-mcp","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"jimprosser\",\n                    \"product\": \"obsidian-web-mcp\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 0.2.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L","score":9.4,"severity":"CRITICAL"}],"references":["https://github.com/jimprosser/obsidian-web-mcp/security/advisories/GHSA-hwhg-mrjc-8g43","https://github.com/jimprosser/obsidian-web-mcp/pull/30","https://github.com/jimprosser/obsidian-web-mcp/commit/e4924f096ee7494a7999d6c0cceca9be08e48eef","https://github.com/jimprosser/obsidian-web-mcp/releases/tag/v0.2.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-54618","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-54618","identifiers":["CVE-2026-54618"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-0580dcc98aaa46a8935f8ff576f25037","complete":true,"records":13764,"lastAttemptAt":"2026-11-12T11:56:20.2141865+00:00","lastSuccessAt":"2026-11-12T11:56:20.209+00:00","error":null,"lastVerifiedAt":"2026-11-12T11:56:20.209+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13817,"expectedIdentifiers":13817,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-12T11:55:28.1860721+00:00","complete":true,"records":1097,"lastAttemptAt":"2026-11-12T11:55:28.1860721+00:00","lastSuccessAt":"2026-11-12T11:55:28.4142299+00:00","error":null,"lastVerifiedAt":"2026-11-12T11:55:28.4142304+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-ea8d0b9744d8407d9df5932458afeb6a","complete":false,"records":13764,"lastAttemptAt":"2026-11-12T11:55:53.6222651+00:00","lastSuccessAt":"2026-11-12T11:55:53.618+00:00","error":null,"lastVerifiedAt":"2026-11-12T11:55:53.618+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13313,"expectedIdentifiers":13817,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-3562b6c78fd1bd0f0b55daf66a0926ae24f65e462df7f6d928caad458fc696bf","complete":true,"records":9947,"lastAttemptAt":"2026-11-12T11:55:28.0344457+00:00","lastSuccessAt":"2026-11-11T04:27:43.6877707+00:00","error":null,"lastVerifiedAt":"2026-11-12T11:55:28.0344457+00:00","snapshotPublishedAt":"2026-11-11T03:32:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-456002455e0ab94bb92c95476d4e6d175c104cd594749982afd96c893728ecbc","complete":true,"records":2010,"lastAttemptAt":"2026-11-12T11:53:33.8856695+00:00","lastSuccessAt":"2026-11-11T02:36:58.1276999+00:00","error":null,"lastVerifiedAt":"2026-11-12T11:53:33.8856695+00:00","snapshotPublishedAt":"2026-11-11T01:17:51+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-f46f74c6a30a9b6e4cfb481719c6d35521ebec2d53ebf163223d093ae587eb9d","complete":true,"records":3106,"lastAttemptAt":"2026-11-12T11:55:28.1484531+00:00","lastSuccessAt":"2026-11-12T09:55:31.1176285+00:00","error":null,"lastVerifiedAt":"2026-11-12T11:55:28.1484531+00:00","snapshotPublishedAt":"2026-11-12T09:48:13+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-e59fd13399d7070c31f5f25102a6bcd537ccba91d773c8427fcf0d07ea0fe2d5","complete":true,"records":231700,"lastAttemptAt":"2026-11-12T11:55:27.8998515+00:00","lastSuccessAt":"2026-11-12T11:55:26.4268762+00:00","error":null,"lastVerifiedAt":"2026-11-12T11:55:27.8998515+00:00","snapshotPublishedAt":"2026-11-12T11:33:13+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}